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2026-11-04T18:33:30Z
User contributions
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https://wiki.snu.edu.in/index.php?title=Wifi_guide&diff=1195
Wifi guide
2026-05-27T06:56:55Z
<p>Deepak: redesign</p>
<hr />
<div>__NOTOC__<br />
<div style="font-family: system-ui, -apple-system, sans-serif; max-width: 1000px; margin: 0 auto; color: #333333; line-height: 1.6;"><br />
<br />
<div style="border-bottom: 3px solid #002D62; padding-bottom: 10px; margin-bottom: 25px;"><br />
<h1 style="color: #002D62; margin: 0; font-size: 2.2em; font-weight: 700;">Campus Wireless Networks Setup</h1><br />
<p style="margin: 5px 0 0 0; color: #666; font-size: 1.1em;">Official configuration instructions for Student, Guest, and Eduroam networks.</p><br />
</div><br />
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<div style="background-color: #f0fdf4; border-left: 4px solid #16a34a; color: #14532d; padding: 15px; border-radius: 4px; margin-bottom: 30px;"><br />
<strong>π‘ Mandatory Browser Login:</strong> Across all platforms, associating with the Wi-Fi SSID is only the first step[cite: 327]. You <strong>must open a web browser</strong> (Safari, Chrome, or Edge) and input your NetID credentials to clear the university captive portal gateway for active internet access.<br />
</div><br />
<br />
<h2 style="color: #002D62; border-bottom: 1px solid #e2e8f0; padding-bottom: 8px;">π± Student Wi-Fi Configuration ("Student" SSID)</h2><br />
<br />
<div style="background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 20px; margin-bottom: 20px;"><br />
<h3 style="margin-top: 0; color: #004080; font-size: 1.2em;">π€ Android Devices</h3><br />
<p>Enable Wi-Fi, select the <strong>Student</strong> SSID from your available network panel, and deploy these parameters[cite: 36]:</p><br />
<br />
<div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: flex-start;"><br />
<div style="flex: 1; min-width: 300px;"><br />
<table style="width: 100%; font-size: 0.95em; line-height: 1.8;"><br />
<tr><td width="180"><strong>EAP Method:</strong></td><td><code>PEAP</code> [cite: 55]</td></tr><br />
<tr><td><strong>Phase 2 Auth:</strong></td><td><code>MSCHAPV2</code> [cite: 56]</td></tr><br />
<tr><td><strong>CA Certificate:</strong></td><td>Use system certificates [cite: 57]</td></tr><br />
<tr><td><strong>Online Cert Status:</strong></td><td>Don't validate [cite: 58]</td></tr><br />
<tr><td><strong>Domain:</strong></td><td><code>snu.in</code> [cite: 59]</td></tr><br />
<tr><td><strong>Identity:</strong></td><td>Your NetID username (e.g., <code>ab123</code>) [cite: 60]</td></tr><br />
<tr><td><strong>Password:</strong></td><td>Your NetID password [cite: 61]</td></tr><br />
<tr><td><strong>MAC Address Type:</strong></td><td>Phone MAC [cite: 62]</td></tr><br />
</table><br />
<p style="background: #fff9e6; border-left: 4px solid #ffcc00; color: #665200; padding: 8px; font-size: 0.9em; margin-top: 10px; border-radius: 4px;"><br />
<strong>β οΈ Note:</strong> You must completely turn off <strong>Private DNS</strong> in your system settings to avoid destination resolution failures[cite: 63].<br />
</p><br />
</div><br />
<div style="border: 1px solid #cbd5e1; padding: 5px; background: white; border-radius: 4px;"><br />
[[File:Wifi_Android_Selection.jpg|150px|thumb|center|Android SSID Selection View]]<br />
</div><br />
</div><br />
</div><br />
<br />
<div style="background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 20px; margin-bottom: 20px;"><br />
<h3 style="margin-top: 0; color: #004080; font-size: 1.2em;">π Apple iOS / iPadOS</h3><br />
<div style="display: flex; gap: 20px; flex-wrap: wrap;"><br />
<div style="flex: 1; min-width: 300px;"><br />
<ol style="margin: 0; padding-left: 20px; line-height: 1.8;"><br />
<li>Navigate to <strong>Settings &rarr; Wi-Fi</strong> and enable the antenna toggle[cite: 67].</li><br />
<li>Select <strong>Student</strong> from your network population array[cite: 93].</li><br />
<li>Enter your unique campus <strong>NetID</strong> and matching security password, then tap <strong>Join</strong>[cite: 96].</li><br />
<li>When the <code>*.snu.in</code> security certificate payload validation prompts, click <span style="color: #16a34a; font-weight: bold;">Trust</span>[cite: 102, 104].</li><br />
<li>Open Safari to execute your captive gateway profile authentication[cite: 135].</li><br />
</ol><br />
</div><br />
<div style="border: 1px solid #cbd5e1; padding: 5px; background: white; border-radius: 4px;"><br />
[[File:Wifi_iOS_Setup.jpg|220px|thumb|center|iOS Trust Certificate Display]]<br />
</div><br />
</div><br />
</div><br />
<br />
<div style="background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 20px; margin-bottom: 20px;"><br />
<h3 style="margin-top: 0; color: #004080; font-size: 1.2em;">πͺ Windows Manual 802.1X Profile Setup</h3><br />
<div style="display: flex; gap: 20px; flex-wrap: wrap;"><br />
<div style="flex: 1; min-width: 300px;"><br />
<ol style="margin: 0; padding-left: 20px; font-size: 0.95em; line-height: 1.7;"><br />
<li>Right-click your taskbar tray Wi-Fi asset icon and select <strong>Open Network and Sharing Center</strong>[cite: 167, 168].</li><br />
<li>Click <strong>Set up a new connection or network</strong> &rarr; Choose <strong>Manually connect to a wireless network</strong>[cite: 169, 170].</li><br />
<li>Set Network Name to <kbd>Student</kbd> and choose Security Type: <kbd>WPA-2Enterprise</kbd>[cite: 175, 176].</li><br />
<li>Click <strong>Change connection settings</strong>, then enter the <strong>Security</strong> tab[cite: 177, 181].</li><br />
<li>Click <strong>Settings</strong> next to the authentication method dropdown[cite: 182].</li><br />
<li><span style="color: #b91c1c; font-weight: bold;">Uncheck</span> <em>"Verify the server's identity by validating the certificate"</em>[cite: 183].</li><br />
<li>Click <strong>Configure</strong> right below it and <span style="color: #b91c1c; font-weight: bold;">uncheck</span> <em>"Automatically use my Windows logon name and password"</em>[cite: 183, 184]. Click OK.</li><br />
<li>From Advanced Settings, check <strong>Specify authentication mode</strong>, select <strong>User Authentication</strong>, click <strong>Save Credentials</strong>, and input your fixed NetID account details[cite: 185, 190, 191].</li><br />
</ol><br />
</div><br />
<div style="border: 1px solid #cbd5e1; padding: 5px; background: white; border-radius: 4px;"><br />
[[File:Wifi_Windows_Manual.jpg|200px|thumb|center|Windows Wireless Settings Panel]]<br />
</div><br />
</div><br />
</div><br />
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<div style="background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 20px; margin-bottom: 40px;"><br />
<h3 style="margin-top: 0; color: #004080; font-size: 1.2em;">Linux Ubuntu</h3><br />
<div style="display: flex; gap: 20px; flex-wrap: wrap;"><br />
<div style="flex: 1; min-width: 300px;"><br />
<ol style="margin: 0; padding-left: 20px; line-height: 1.8;"><br />
<li>Click the network engine indicator on the top panel array and highlight <strong>Student</strong>[cite: 222].</li><br />
<li>Configure Authentication mode to <strong>Protected EAP (PEAP)</strong>[cite: 275].</li><br />
<li>Set Inner Authentication to <code>MSCHAPv2</code>, complete your NetID credentials, and select Connect[cite: 276, 290].</li><br />
<li>When alerted with a missing Certificate Authority flag, click <strong>Don't warn me again</strong> and proceed via <strong>Ignore</strong>[cite: 303, 306].</li><br />
</ol><br />
</div><br />
<div style="border: 1px solid #cbd5e1; padding: 5px; background: white; border-radius: 4px;"><br />
[[File:Wifi_Ubuntu_Auth.jpg|180px|thumb|center|Ubuntu PEAP Settings View]]<br />
</div><br />
</div><br />
</div><br />
<br />
<h2 style="color: #002D62; border-bottom: 1px solid #e2e8f0; padding-bottom: 8px;">π Guest Wireless Provisioning ("GUEST" SSID)</h2><br />
<p>External university visitors can access campus networks using our self-provisioning gateway matrix[cite: 337]:</p><br />
<br />
<div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin: 15px 0;"><br />
<div style="background: white; border: 1px solid #e2e8f0; padding: 15px; border-radius: 6px;"><br />
<h4 style="margin: 0 0 10px 0; color: #004080;">π Registration Step</h4><br />
<ol style="margin: 0; padding-left: 15px; font-size: 0.95em;"><br />
<li>Associate with the open <strong>GUEST</strong> SSID[cite: 338].</li><br />
<li>Tap "Sign into the network" to prompt the Cloudflare-protected <strong>Self Registration Page</strong>[cite: 23, 339].</li><br />
<li>Provide your host Sponsor Name, personal email, contact number (using prefix "0"), and duration of visit[cite: 342, 347, 348, 349]. Click Register[cite: 350].</li><br />
</ol><br />
</div><br />
<div style="background: white; border: 1px solid #e2e8f0; padding: 15px; border-radius: 6px;"><br />
<h4 style="margin: 0 0 10px 0; color: #004080;">π Verification Box</h4><br />
<p style="margin: 0; font-size: 0.95em;">The <strong>Log In</strong> action element stays disabled during registration processing[cite: 356]. Your sponsor must authorize your session check before our engine sends your passcode via SMS/Email text strings[cite: 356, 377, 378].</p><br />
</div><br />
<div style="border: 1px solid #cbd5e1; padding: 5px; background: white; border-radius: 4px; text-align:center;"><br />
[[File:Wifi_Guest_Portal.jpg|180px|thumb|center|Self Registration Field Panel]]<br />
</div><br />
</div><br />
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<h2 style="color: #002D62; border-bottom: 1px solid #e2e8f0; padding-bottom: 8px; margin-top: 30px;">βοΈ Faculty & Staff Sponsor Approval Workflow</h2><br />
<div style="display: flex; gap: 20px; flex-wrap: wrap; align-items: center; background: #fdfdfd; border: 1px solid #cbd5e1; padding: 20px; border-radius: 6px;"><br />
<div style="flex: 1; min-width: 300px;"><br />
<p style="margin-top:0;">When a visitor lists you as their host, you must clear their clearance query:</p><br />
<ul style="padding-left: 20px; line-height: 1.8; margin: 0;"><br />
<li>Locate incoming system mail validation notes from <code>noreply@snu.edu.in</code>[cite: 395].</li><br />
<li>Subject Header reads: <code>Wireless access request from [Guest Email Address]</code>[cite: 395].</li><br />
<li>Click the secure red-circled <strong>"click here"</strong> validation text inside the text block to access the portal dashboard[cite: 405, 410].</li><br />
<li>Review your guest's metadata profile and click <strong>Confirm</strong> to establish network access permissions[cite: 429, 432].</li><br />
</ul><br />
</div><br />
<div style="border: 1px solid #cbd5e1; padding: 5px; background: white; border-radius: 4px;"><br />
[[File:Wifi_Sponsor_Approval.jpg|250px|thumb|center|Sponsor Validation Email Notification]]<br />
</div><br />
</div><br />
<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Wifi_guide&diff=1194
Wifi guide
2026-05-22T07:14:26Z
<p>Deepak: new</p>
<hr />
<div>__NOTOC__<br />
<div style="font-family: system-ui, -apple-system, sans-serif; max-width: 1000px; margin: 0 auto; color: #333333; line-height: 1.6;"><br />
<br />
<div style="border-bottom: 3px solid #002D62; padding-bottom: 10px; margin-bottom: 25px;"><br />
<h1 style="color: #002D62; margin: 0; font-size: 2.2em; font-weight: 700;">University Wi-Fi Configuration & Access Guide</h1><br />
<p style="margin: 5px 0 0 0; color: #666; font-size: 1.1em;">Step-by-step wireless network setup for Students, Faculty, Guests, and Researchers.</p><br />
</div><br />
<br />
<h2 style="color: #002D62; border-bottom: 1px solid #e2e8f0; padding-bottom: 8px;"><span style="background: #002D62; color: white; border-radius: 4px; padding: 2px 8px; margin-right: 8px; font-size: 0.8em;">1</span> Overview of Campus Wireless Networks</h2><br />
<p>The university provides three primary wireless networks to ensure seamless connectivity. Use the table below to identify the correct network for your needs.</p><br />
<br />
<table class="wikitable" style="width: 100%; border-collapse: collapse; margin: 20px 0; box-shadow: 0 2px 5px rgba(0,0,0,0.05);"><br />
<thead><br />
<tr style="background-color: #002D62; color: white; text-align: left;"><br />
<th style="padding: 12px; border: 1px solid #dee2e6;">SSID Name</th><br />
<th style="padding: 12px; border: 1px solid #dee2e6;">Target Audience</th><br />
<th style="padding: 12px; border: 1px solid #dee2e6;">Primary Authentication Method</th><br />
</tr><br />
</thead><br />
<tbody><br />
<tr><br />
<td style="padding: 12px; border: 1px solid #dee2e6; font-weight: bold; color: #004080;">Student</td><br />
<td style="padding: 12px; border: 1px solid #dee2e6;">Enrolled Students & Faculty</td><br />
<td style="padding: 12px; border: 1px solid #dee2e6;">NetID and Password (802.1X/EAP)</td><br />
</tr><br />
<tr style="background-color: #f8fafc;"><br />
<td style="padding: 12px; border: 1px solid #dee2e6; font-weight: bold; color: #004080;">GUEST</td><br />
<td style="padding: 12px; border: 1px solid #dee2e6;">Visitors and University Guests</td><br />
<td style="padding: 12px; border: 1px solid #dee2e6;">Self-registration & Sponsor Approval</td><br />
</tr><br />
<tr><br />
<td style="padding: 12px; border: 1px solid #dee2e6; font-weight: bold; color: #004080;">eduroam</td><br />
<td style="padding: 12px; border: 1px solid #dee2e6;">Traveling Students and Researchers</td><br />
<td style="padding: 12px; border: 1px solid #dee2e6;">Institutional Credentials (Global Roaming)</td><br />
</tr><br />
</tbody><br />
</table><br />
<br />
<div style="background-color: #f0fdf4; border-left: 4px solid #16a34a; color: #14532d; padding: 15px; border-radius: 4px; margin: 25px 0;"><br />
<strong>π‘ Mandatory Step for All Networks:</strong> Connecting to the Wi-Fi SSID is only the first step. Across all platforms, you <strong>must open a web browser</strong> (Safari, Chrome, Edge) and enter your credentials to clear the university gateway/captive portal to gain full internet access.<br />
</div><br />
<br />
<h2 style="color: #002D62; border-bottom: 1px solid #e2e8f0; padding-bottom: 8px; margin-top: 40px;"><span style="background: #002D62; color: white; border-radius: 4px; padding: 2px 8px; margin-right: 8px; font-size: 0.8em;">2</span> Student Wi-Fi Configuration ("Student" SSID)</h2><br />
<br />
<div style="margin-top: 20px;"><br />
<br />
<div style="background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 20px; margin-bottom: 15px;"><br />
<h3 style="margin-top: 0; color: #004080; font-size: 1.15em; display: flex; align-items: center; gap: 8px;">π€ Android Devices</h3><br />
<p style="margin-bottom: 10px;">Navigate to Wi-Fi settings, select the <strong>Student</strong> SSID, and enter the following parameters:</p><br />
<br />
<div style="background: #fff9e6; border-left: 4px solid #ffcc00; color: #665200; padding: 10px; border-radius: 4px; margin-bottom: 15px; font-size: 0.9em;"><br />
<strong>β οΈ Critical:</strong> You must turn off <strong>Private DNS</strong> in your connection/network settings to avoid domain resolution errors. Set MAC address type to <strong>Phone MAC</strong>.<br />
</div><br />
<br />
<table style="width: 100%; font-size: 0.95em; line-height: 1.8;"><br />
<tr><td width="200"><strong>EAP Method:</strong></td><td><code>PEAP</code></td></tr><br />
<tr><td><strong>Phase 2 Authentication:</strong></td><td><code>MSCHAPV2</code></td></tr><br />
<tr><td><strong>CA Certificate:</strong></td><td>Use system certificates</td></tr><br />
<tr><td><strong>Online Certificate Status:</strong></td><td>Don't validate</td></tr><br />
<tr><td><strong>Domain:</strong></td><td><code>snu.in</code></td></tr><br />
<tr><td><strong>Identity:</strong></td><td>Your NetID username (e.g., <code>ab123</code>)</td></tr><br />
<tr><td><strong>Password:</strong></td><td>Your NetID password</td></tr><br />
</table><br />
</div><br />
<br />
<div style="background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 20px; margin-bottom: 15px;"><br />
<h3 style="margin-top: 0; color: #004080; font-size: 1.15em;">π Apple iOS / iPadOS</h3><br />
<ol style="margin: 0; padding-left: 20px;"><br />
<li>Open <strong>Settings</strong> and select <strong>Wi-Fi</strong>.</li><br />
<li>Select <strong>Student</strong> from the list of available networks.</li><br />
<li>Enter your NetID and Password and tap <strong>Join</strong>.</li><br />
<li>A certificate prompt will appear; you must tap <span style="color: #16a34a; font-weight: bold;">Trust</span> to proceed.</li><br />
<li>Launch the <strong>Safari</strong> browser and re-enter your credentials at the redirect page to clear the gateway.</li><br />
</ol><br />
</div><br />
<br />
<div style="background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 20px; margin-bottom: 15px;"><br />
<h3 style="margin-top: 0; color: #004080; font-size: 1.15em;">π» Apple macOS</h3><br />
<ol style="margin: 0; padding-left: 20px;"><br />
<li>Click the <strong>Wi-Fi / AirPort icon</strong> in the upper-right menu bar.</li><br />
<li>Select the <strong>Student</strong> Wi-Fi access point.</li><br />
<li>Enter your NetID credentials in the pop-up box and click <strong>Join</strong>.</li><br />
<li>Open your web browser to finish portal web authentication.</li><br />
</ol><br />
</div><br />
<br />
<div style="background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 20px; margin-bottom: 15px;"><br />
<h3 style="margin-top: 0; color: #004080; font-size: 1.15em;">πͺ Windows Manual 802.1X Setup</h3><br />
<p style="font-size: 0.9em; color: #555;">Follow these steps precisely to manually configure the advanced secure enterprise profile:</p><br />
<ol style="margin: 0; padding-left: 20px; line-height: 1.7;"><br />
<li>Click the Wi-Fi network icon on the taskbar, right-click it, and select <strong>Open Network and Sharing Center</strong>.</li><br />
<li>Click <strong>Set up a new connection or network</strong> &rarr; Choose <strong>Manually connect to a wireless network</strong>, then click Next.</li><br />
<li>Network Name: <kbd>Student</kbd> | Security type: <kbd>WPA2-Enterprise</kbd>.</li><br />
<li>Click <strong>Change connection settings</strong> and navigate to the <strong>Security</strong> tab.</li><br />
<li>Click <strong>Settings</strong> (next to network authentication method) and <span style="color: #b91c1c;">uncheck</span> <em>"Verify the server's identity by validating the certificate."</em></li><br />
<li>Click <strong>Configure</strong> (under Authentication Method) and <span style="color: #b91c1c;">uncheck</span> <em>"Automatically use my Windows logon name."</em> Click OK.</li><br />
<li>Return to the Security tab, click <strong>Advanced settings</strong>, check <strong>Specify authentication mode</strong>, and set it to <strong>User Authentication</strong>.</li><br />
<li>Click <span style="font-weight: bold; color: #16a34a;">Save Credentials</span>, type your NetID & password, and click Save. <em>(Skipping this will result in constant disconnects)</em>.</li><br />
<li>Connect to the Student network from your normal bar network tray. Open a browser if the authentication pop-up does not automatically prompt.</li><br />
</ol><br />
</div><br />
<br />
<div style="background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 20px; margin-bottom: 15px;"><br />
<h3 style="margin-top: 0; color: #004080; font-size: 1.15em;">π§ Ubuntu Linux</h3><br />
<ol style="margin: 0; padding-left: 20px;"><br />
<li>Click the network manager icon on the top panel and select <strong>Student</strong>.</li><br />
<li>Set Authentication field to <strong>Protected EAP (PEAP)</strong>.</li><br />
<li>Leave inner authentication as <code>MSCHAPv2</code>, enter your NetID credentials, and click Connect.</li><br />
<li>When the certificate warning appears, select <strong>Don't warn me again</strong> and click <strong>Ignore</strong>.</li><br />
<li>Open your browser to execute final portal routing.</li><br />
</ol><br />
</div><br />
<br />
</div><br />
<br />
<h2 style="color: #002D62; border-bottom: 1px solid #e2e8f0; padding-bottom: 8px; margin-top: 40px;"><span style="background: #002D62; color: white; border-radius: 4px; padding: 2px 8px; margin-right: 8px; font-size: 0.8em;">3</span> Guest Wi-Fi Access ("GUEST" SSID)</h2><br />
<div style="display: flex; gap: 20px; flex-wrap: wrap; margin-top: 15px;"><br />
<div style="flex: 1; min-width: 280px; background: #ffffff; border: 1px solid #e2e8f0; padding: 15px; border-radius: 6px;"><br />
<h4 style="margin: 0 0 10px 0; color: #004080;">π± Registration Workflow</h4><br />
<ol style="margin: 0; padding-left: 20px; font-size: 0.95em;"><br />
<li>Connect to the <strong>GUEST</strong> wireless network.</li><br />
<li>Click "Sign into network" or open a browser to reach the Self-Registration page.</li><br />
<li>Fill out your legal personal details and submit.</li><br />
</ol><br />
</div><br />
<div style="flex: 1; min-width: 280px; background: #ffffff; border: 1px solid #e2e8f0; padding: 15px; border-radius: 6px;"><br />
<h4 style="margin: 0 0 10px 0; color: #004080;">π Credentials & Login</h4><br />
<ul style="margin: 0; padding-left: 20px; font-size: 0.95em; list-style-type: square;"><br />
<li><strong>Username:</strong> Your registered mobile number.</li><br />
<li><strong>Password:</strong> Dispatched via automated SMS/Email.</li><br />
</ul><br />
</div><br />
</div><br />
<br />
<div style="background-color: #fef2f2; border-left: 4px solid #ef4444; color: #991b1b; padding: 12px; border-radius: 4px; margin-top: 15px; font-size: 0.9em;"><br />
<strong>π« Crucial Restriction:</strong> The login portal button remains disabled until your internal university sponsor confirms your request. Do not attempt access until the SMS text arrives.<br />
</div><br />
<br />
<h2 style="color: #002D62; border-bottom: 1px solid #e2e8f0; padding-bottom: 8px; margin-top: 40px;"><span style="background: #002D62; color: white; border-radius: 4px; padding: 2px 8px; margin-right: 8px; font-size: 0.8em;">4</span> Information for Hosts & Sponsors</h2><br />
<p>University staff or faculty members must authorize guest access requests through the following automated workflow:</p><br />
<div style="background: #f8fafc; border: 1px solid #cbd5e1; border-radius: 6px; padding: 15px; font-size: 0.95em;"><br />
<p style="margin: 0 0 8px 0;"><strong>1. Notification:</strong> Watch out for an automated alert system message from <code>noreply@snu.edu.in</code>.</p><br />
<p style="margin: 0 0 8px 0;"><strong>2. Subject Format:</strong> <code>Wireless access request from [Guest Email Address]</code></p><br />
<p style="margin: 0;"><strong>3. Action:</strong> Click the secure <strong>"Click here"</strong> hyperlinked text string inside the body to reach the verification console panel, then click <strong>Confirm</strong> or <strong>Reject</strong>.</p><br />
</div><br />
<br />
<h2 style="color: #002D62; border-bottom: 1px solid #e2e8f0; padding-bottom: 8px; margin-top: 40px;"><span style="background: #002D62; color: white; border-radius: 4px; padding: 2px 8px; margin-right: 8px; font-size: 0.8em;">5</span> Eduroam (Global Educational Roaming)</h2><br />
<p><strong>Eduroam</strong> is a secure, international roaming service developed for the research and higher education community. It allows students, researchers, and staff from participating institutions to obtain internet connectivity across campus and when visiting other participating institutions worldwide using their home university credentials.</p><br />
<br />
<div style="background: #fff3cd; border-left: 4px solid #d97706; color: #78350f; padding: 12px; border-radius: 4px; font-size: 0.9em; margin-top: 10px;"><br />
<strong>π Security Warning:</strong> While using eduroam locally or abroad, you are strictly bound by the data security policies and firewall configurations of the <em>host/visited</em> institution. Content filtering might differ considerably from your home network configurations.<br />
</div><br />
<br />
<h2 style="color: #b91c1c; border-bottom: 1px solid #fca5a5; padding-bottom: 8px; margin-top: 40px;"><span style="background: #b91c1c; color: white; border-radius: 4px; padding: 2px 8px; margin-right: 8px; font-size: 0.8em;">6</span> Troubleshooting & Common Fixes</h2><br />
<br />
<div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; margin-top: 15px; margin-bottom: 40px;"><br />
<div style="border: 1px solid #fca5a5; background: #fffdfd; padding: 15px; border-radius: 6px;"><br />
<h4 style="margin: 0 0 8px 0; color: #b91c1c;">π Portal Disruption (Windows)</h4><br />
<p style="margin: 0; font-size: 0.9em; color: #444;">If the browser landing screen fails to initialize automatically upon manual login connection, explicitly force traffic generation by typing any unencrypted, legacy HTTP domain (e.g., <code>http://neverssl.com</code>) to force gateway redirection.</p><br />
</div><br />
<br />
<div style="border: 1px solid #fca5a5; background: #fffdfd; padding: 15px; border-radius: 6px;"><br />
<h4 style="margin: 0 0 8px 0; color: #b91c1c;">π Need IT HelpDesk Escalation?</h4><br />
<p style="margin: 0; font-size: 0.9em; color: #444;"><br />
<strong>π§ Internal Email:</strong> [mailto:ithelpdesk@snu.edu.in ithelpdesk@snu.edu.in]<br><br />
<strong>βοΈ Landline / VOIP:</strong> 0120-7170105 / Ext. 411<br><br />
<strong>π Desk Location:</strong> Central Library, Ground Floor<br />
</p><br />
</div><br />
</div><br />
<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Wifi_guide&diff=1193
Wifi guide
2026-05-22T07:13:32Z
<p>Deepak: new</p>
<hr />
<div>__NOTOC__ __NOEDITSECTION__<br />
<div style="font-family: system-ui, -apple-system, sans-serif; max-width: 1200px; margin: 0 auto; color: #333333;"><br />
<br />
<div style="background: linear-gradient(135deg, #002D62 0%, #004080 100%); color: #ffffff; padding: 40px 20px; text-align: center; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); margin-bottom: 20px;"><br />
<h1 style="color: #ffffff; margin: 0 0 10px 0; font-size: 2.2em; font-weight: 700; letter-spacing: -0.5px;">Shiv Nadar University IT Support Portal</h1><br />
<p style="margin: 0; font-size: 1.1em; color: #e0e8f5; font-weight: 300;">Your central gateway for NetID, Campus Wi-Fi, LMS, and Enterprise Systems</p><br />
</div><br />
<br />
<div style="background-color: #fff9e6; border-left: 4px solid #ffcc00; color: #665200; padding: 15px 20px; border-radius: 4px; margin-bottom: 30px; font-size: 0.95em; display: flex; align-items: center; gap: 10px;"><br />
<span><strong>β οΈ System Alert:</strong> Blackboard LMS and PeopleSoft ERP will undergo routine maintenance this Saturday from 11:00 PM to Sunday 3:00 AM. Plan your assignments accordingly.</span><br />
</div><br />
<br />
<div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 25px; margin-bottom: 40px;"><br />
<br />
<div style="background: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; box-shadow: 0 4px 12px rgba(0,0,0,0.03); transition: transform 0.2s;"><br />
<h3 style="margin-top: 0; color: #002D62; font-size: 1.3em; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px; display: flex; align-items: center; gap: 8px;">π Student Hub</h3><br />
<ul style="list-style-type: none; padding-left: 0; margin: 15px 0 0 0; line-height: 2;"><br />
<li>π [[NetID Activation & Password Reset]]</li><br />
<li>π [[Connecting to SNU-Secure Wi-Fi]]</li><br />
<li>π [[Hostel IoT & Gaming Device Setup]]</li><br />
<li>π [[Blackboard LMS Guide for Students]]</li><br />
<li>π [[PeopleSoft Student Portal Support]]</li><br />
<li>π [[Campus Printing via PaperCut]]</li><br />
</ul><br />
</div><br />
<br />
<div style="background: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; box-shadow: 0 4px 12px rgba(0,0,0,0.03); transition: transform 0.2s;"><br />
<h3 style="margin-top: 0; color: #002D62; font-size: 1.3em; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px; display: flex; align-items: center; gap: 8px;">π Faculty & Staff Hub</h3><br />
<ul style="list-style-type: none; padding-left: 0; margin: 15px 0 0 0; line-height: 2;"><br />
<li>π [[Classroom AV & Hybrid Teaching Guide]]</li><br />
<li>π [[PeopleSoft HR & Finance Portals]]</li><br />
<li>π [[Microsoft Teams & M365 Setup]]</li><br />
<li>π [[VPN Remote Access (FortiClient)]]</li><br />
<li>π [[Software Licensing & MATLAB Keys]]</li><br />
<li>π [[Guest Wi-Fi Coupon Generation]]</li><br />
</ul><br />
</div><br />
<br />
<div style="background: #f8fafc; border: 1px solid #cbd5e1; border-radius: 8px; padding: 24px; box-shadow: 0 4px 12px rgba(0,0,0,0.02);"><br />
<h3 style="margin-top: 0; color: #b91c1c; font-size: 1.3em; border-bottom: 2px solid #cbd5e1; padding-bottom: 10px; display: flex; align-items: center; gap: 8px;">π¨ Need Immediate Help?</h3><br />
<p style="margin: 15px 0 8px 0; font-size: 0.95em;"><strong>π Help Desk:</strong> Central Library, Ground Floor</p><br />
<p style="margin: 0 0 8px 0; font-size: 0.95em;"><strong>π Intercom:</strong> Ext. 411 / 412</p><br />
<p style="margin: 0 0 8px 0; font-size: 0.95em;"><strong>βοΈ Email:</strong> [mailto:ithelpdesk@snu.edu.in ithelpdesk@snu.edu.in]</p><br />
<p style="margin: 0 0 15px 0; font-size: 0.95em;"><strong>π Hours:</strong> Mon-Sat: 09:00 AM - 06:00 PM</p><br />
<a href="https://itsupport.snu.edu.in" target="_blank" style="display: block; text-align: center; background: #b91c1c; color: white; padding: 10px; border-radius: 6px; text-decoration: none; font-weight: bold; margin-top: 15px; box-shadow: 0 2px 4px rgba(185,28,28,0.2);">Raise an IT Ticket</a><br />
</div><br />
<br />
</div><br />
<br />
<hr style="border: 0; border-top: 1px solid #e2e8f0; margin: 40px 0;"><br />
<br />
<h2 style="color: #002D62; font-size: 1.6em; margin-bottom: 20px; text-align: center;">π οΈ Core Infrastructure & Security</h2><br />
<br />
<div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(450px, 1fr)); gap: 25px; margin-bottom: 50px;"><br />
<br />
<div style="background: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 20px; display: flex; gap: 15px; align-items: flex-start; box-shadow: 0 2px 4px rgba(0,0,0,0.02);"><br />
<div style="font-size: 2em; background: #f0fdf4; padding: 10px; border-radius: 8px; line-height: 1;">π‘οΈ</div><br />
<div><br />
<h4 style="margin: 0 0 8px 0; color: #002D62; font-size: 1.1em;">Information Security & Compliance</h4><br />
<ul style="padding-left: 20px; margin: 0; line-height: 1.8;"><br />
<li>[[Setting up Multi-Factor Authentication (MFA)]]</li><br />
<li>[[Reporting Phishing and Suspicious Emails]]</li><br />
<li>[[Data Classification & Policy Compliance]]</li><br />
</ul><br />
</div><br />
</div><br />
<br />
<div style="background: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 20px; display: flex; gap: 15px; align-items: flex-start; box-shadow: 0 2px 4px rgba(0,0,0,0.02);"><br />
<div style="font-size: 2em; background: #eff6ff; padding: 10px; border-radius: 8px; line-height: 1;">π</div><br />
<div><br />
<h4 style="margin: 0 0 8px 0; color: #002D62; font-size: 1.1em;">Infrastructure & Assets</h4><br />
<ul style="padding-left: 20px; margin: 0; line-height: 1.8;"><br />
<li>[[Campus Telephony & VoIP Guide]]</li><br />
<li>[[Hardware Procurement Recommended Specs]]</li><br />
<li>[[Laptop Repair & Loaner Device Policy]]</li><br />
</ul><br />
</div><br />
</div><br />
<br />
</div><br />
<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Index_page&diff=1192
Index page
2026-05-22T07:05:26Z
<p>Deepak: new</p>
<hr />
<div>__NOTOC__ __NOEDITSECTION__<br />
<div style="font-family: system-ui, -apple-system, sans-serif; max-width: 1200px; margin: 0 auto; color: #333333;"><br />
<br />
<div style="background: linear-gradient(135deg, #002D62 0%, #004080 100%); color: #ffffff; padding: 40px 20px; text-align: center; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); margin-bottom: 20px;"><br />
<h1 style="color: #ffffff; margin: 0 0 10px 0; font-size: 2.2em; font-weight: 700; letter-spacing: -0.5px;">Shiv Nadar University IT Support Portal</h1><br />
<p style="margin: 0; font-size: 1.1em; color: #e0e8f5; font-weight: 300;">Your central gateway for NetID, Campus Wi-Fi, LMS, and Enterprise Systems</p><br />
</div><br />
<br />
<div style="background-color: #fff9e6; border-left: 4px solid #ffcc00; color: #665200; padding: 15px 20px; border-radius: 4px; margin-bottom: 30px; font-size: 0.95em; display: flex; align-items: center; gap: 10px;"><br />
<span><strong>β οΈ System Alert:</strong> Blackboard LMS and PeopleSoft ERP will undergo routine maintenance this Saturday from 11:00 PM to Sunday 3:00 AM. Plan your assignments accordingly.</span><br />
</div><br />
<br />
<div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 25px; margin-bottom: 40px;"><br />
<br />
<div style="background: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; box-shadow: 0 4px 12px rgba(0,0,0,0.03); transition: transform 0.2s;"><br />
<h3 style="margin-top: 0; color: #002D62; font-size: 1.3em; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px; display: flex; align-items: center; gap: 8px;">π Student Hub</h3><br />
<ul style="list-style-type: none; padding-left: 0; margin: 15px 0 0 0; line-height: 2;"><br />
<li>π [[NetID Activation & Password Reset]]</li><br />
<li>π [[Connecting to SNU-Secure Wi-Fi]]</li><br />
<li>π [[Hostel IoT & Gaming Device Setup]]</li><br />
<li>π [[Blackboard LMS Guide for Students]]</li><br />
<li>π [[PeopleSoft Student Portal Support]]</li><br />
<li>π [[Campus Printing via PaperCut]]</li><br />
</ul><br />
</div><br />
<br />
<div style="background: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 24px; box-shadow: 0 4px 12px rgba(0,0,0,0.03); transition: transform 0.2s;"><br />
<h3 style="margin-top: 0; color: #002D62; font-size: 1.3em; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px; display: flex; align-items: center; gap: 8px;">π Faculty & Staff Hub</h3><br />
<ul style="list-style-type: none; padding-left: 0; margin: 15px 0 0 0; line-height: 2;"><br />
<li>π [[Classroom AV & Hybrid Teaching Guide]]</li><br />
<li>π [[PeopleSoft HR & Finance Portals]]</li><br />
<li>π [[Microsoft Teams & M365 Setup]]</li><br />
<li>π [[VPN Remote Access (FortiClient)]]</li><br />
<li>π [[Software Licensing & MATLAB Keys]]</li><br />
<li>π [[Guest Wi-Fi Coupon Generation]]</li><br />
</ul><br />
</div><br />
<br />
<div style="background: #f8fafc; border: 1px solid #cbd5e1; border-radius: 8px; padding: 24px; box-shadow: 0 4px 12px rgba(0,0,0,0.02);"><br />
<h3 style="margin-top: 0; color: #b91c1c; font-size: 1.3em; border-bottom: 2px solid #cbd5e1; padding-bottom: 10px; display: flex; align-items: center; gap: 8px;">π¨ Need Immediate Help?</h3><br />
<p style="margin: 15px 0 8px 0; font-size: 0.95em;"><strong>π Help Desk:</strong> Central Library, Ground Floor</p><br />
<p style="margin: 0 0 8px 0; font-size: 0.95em;"><strong>π Intercom:</strong> Ext. 411 / 412</p><br />
<p style="margin: 0 0 8px 0; font-size: 0.95em;"><strong>βοΈ Email:</strong> [mailto:ithelpdesk@snu.edu.in ithelpdesk@snu.edu.in]</p><br />
<p style="margin: 0 0 15px 0; font-size: 0.95em;"><strong>π Hours:</strong> Mon-Sat: 09:00 AM - 06:00 PM</p><br />
<a href="https://itsupport.snu.edu.in" target="_blank" style="display: block; text-align: center; background: #b91c1c; color: white; padding: 10px; border-radius: 6px; text-decoration: none; font-weight: bold; margin-top: 15px; box-shadow: 0 2px 4px rgba(185,28,28,0.2);">Raise an IT Ticket</a><br />
</div><br />
<br />
</div><br />
<br />
<hr style="border: 0; border-top: 1px solid #e2e8f0; margin: 40px 0;"><br />
<br />
<h2 style="color: #002D62; font-size: 1.6em; margin-bottom: 20px; text-align: center;">π οΈ Core Infrastructure & Security</h2><br />
<br />
<div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(450px, 1fr)); gap: 25px; margin-bottom: 50px;"><br />
<br />
<div style="background: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 20px; display: flex; gap: 15px; align-items: flex-start; box-shadow: 0 2px 4px rgba(0,0,0,0.02);"><br />
<div style="font-size: 2em; background: #f0fdf4; padding: 10px; border-radius: 8px; line-height: 1;">π‘οΈ</div><br />
<div><br />
<h4 style="margin: 0 0 8px 0; color: #002D62; font-size: 1.1em;">Information Security & Compliance</h4><br />
<ul style="padding-left: 20px; margin: 0; line-height: 1.8;"><br />
<li>[[Setting up Multi-Factor Authentication (MFA)]]</li><br />
<li>[[Reporting Phishing and Suspicious Emails]]</li><br />
<li>[[Data Classification & Policy Compliance]]</li><br />
</ul><br />
</div><br />
</div><br />
<br />
<div style="background: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 20px; display: flex; gap: 15px; align-items: flex-start; box-shadow: 0 2px 4px rgba(0,0,0,0.02);"><br />
<div style="font-size: 2em; background: #eff6ff; padding: 10px; border-radius: 8px; line-height: 1;">π</div><br />
<div><br />
<h4 style="margin: 0 0 8px 0; color: #002D62; font-size: 1.1em;">Infrastructure & Assets</h4><br />
<ul style="padding-left: 20px; margin: 0; line-height: 1.8;"><br />
<li>[[Campus Telephony & VoIP Guide]]</li><br />
<li>[[Hardware Procurement Recommended Specs]]</li><br />
<li>[[Laptop Repair & Loaner Device Policy]]</li><br />
</ul><br />
</div><br />
</div><br />
<br />
</div><br />
<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Index_page&diff=1191
Index page
2026-05-22T07:03:23Z
<p>Deepak: new</p>
<hr />
<div>__NOTOC__ __NOEDITSECTION__<br />
{| class="wikitable" style="width:100%; border:none; background:none; margin:0;"<br />
|-<br />
| colspan="3" style="background:#003366; color:#ffffff; padding:20px; text-align:center; border-radius:4px;" |<br />
<h1 style="color:#ffffff; margin:0;">Shiv Nadar University IT Support Portal</h1><br />
<p style="margin:5px 0 0 0;">Your central resource for NetID, Campus Wi-Fi, LMS, and Enterprise Systems</p><br />
|<br />
|-<br />
| colspan="3" style="background:#fff3cd; color:#856404; border:1px solid #ffeeba; padding:12px; border-radius:4px; margin-top:10px;" |<br />
'''β οΈ System Alert:''' Blackboard LMS and PeopleSoft ERP will undergo routine maintenance this Saturday from 11:00 PM to Sunday 3:00 AM. Plan your assignments accordingly.<br />
|-<br />
| width="33%" style="vertical-align:top; background:#f8f9fa; border:1px solid #dee2e6; padding:15px; border-radius:4px;" |<br />
=== π Student Hub ===<br />
* [[NetID Activation & Password Reset]]<br />
* [[Connecting to SNU-Secure Wi-Fi]]<br />
* [[Hostel IoT & Gaming Device Setup]]<br />
* [[Blackboard LMS Guide for Students]]<br />
* [[PeopleSoft Student Portal Support]]<br />
* [[Campus Printing via PaperCut]]<br />
| width="33%" style="vertical-align:top; background:#f8f9fa; border:1px solid #dee2e6; padding:15px; border-radius:4px;" |<br />
=== π Faculty & Staff Hub ===<br />
* [[Classroom AV & Hybrid Teaching Guide]]<br />
* [[PeopleSoft HR & Finance Portals]]<br />
* [[Microsoft Teams & M365 Setup]]<br />
* [[VPN Remote Access (FortiClient)]]<br />
* [[Software Licensing & MATLAB Keys]]<br />
* [[Guest Wi-Fi Coupon Generation]]<br />
| width="33%" style="vertical-align:top; background:#f8f9fa; border:1px solid #dee2e6; padding:15px; border-radius:4px;" |<br />
=== π¨ Need Immediate Help? ===<br />
* '''IT Help Desk Location:''' Central Library, Ground Floor<br />
* '''Intercom Extension:''' Ext. 411 / 412<br />
* '''Email Support:''' [mailto:ithelpdesk@snu.edu.in ithelpdesk@snu.edu.in]<br />
* '''Raise a Ticket:''' [https://itsupport.snu.edu.in SNU IT Helpdesk Portal]<br />
* '''Operating Hours:''' Mon-Sat: 09:00 AM - 06:00 PM<br />
|}<br />
<br />
---<br />
=== π οΈ Core Infrastructure & Security Categories ===<br />
{| class="wikitable" style="width:100%; border:none; background:none;"<br />
|-<br />
| width="50%" style="border:1px solid #dee2e6; padding:12px;" |<br />
'''[[File:Lock-icon.png|32px|vertical-align=middle]] Information Security'''<br />
* [[Setting up Multi-Factor Authentication (MFA)]]<br />
* [[Reporting Phishing and Suspicious Emails]]<br />
* [[Data Classification & Policy Compliance]]<br />
| width="50%" style="border:1px solid #dee2e6; padding:12px;" |<br />
'''[[File:Network-icon.png|32px|vertical-align=middle]] Infrastructure & Assets'''<br />
* [[Campus Telephony & VoIP Guide]]<br />
* [[Hardware Procurement Recommended Specs]]<br />
* [[Laptop Repair & Loaner Device Policy]]<br />
|}</div>
Deepak
https://wiki.snu.edu.in/index.php?title=Index_page&diff=1190
Index page
2026-05-22T07:00:49Z
<p>Deepak: new</p>
<hr />
<div><nowiki>__NOTOC__</nowiki> <nowiki>__NOEDITSECTION__</nowiki> {| class="wikitable" style="width:100%; border:none; background:none; margin:0;" |- | colspan="3" style="background:#003366; color:#ffffff; padding:20px; text-align:center; border-radius:4px;" | <span class="hljs-tag"><<span class="hljs-name">h1</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color:#ffffff; margin:0;"</span>></span>Shiv Nadar University IT Support Portal<span class="hljs-tag"></<span class="hljs-name">h1</span>></span> <span class="hljs-tag"><<span class="hljs-name">p</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"margin:5px 0 0 0;"</span>></span>Your central resource for NetID, Campus Wi-Fi, LMS, and Enterprise Systems<span class="hljs-tag"></<span class="hljs-name">p</span>></span> | |- | colspan="3" style="background:#fff3cd; color:#856404; border:1px solid #ffeeba; padding:12px; border-radius:4px; margin-top:10px;" | <nowiki>'''</nowiki>β οΈ System Alert:<nowiki>'''</nowiki> Blackboard LMS and PeopleSoft ERP will undergo routine maintenance this Saturday from 11:00 PM to Sunday 3:00 AM. Plan your assignments accordingly. |- | width="33%" style="vertical-align:top; background:#f8f9fa; border:1px solid #dee2e6; padding:15px; border-radius:4px;" | === π Student Hub === * <nowiki>[[NetID Activation & Password Reset]]</nowiki> * <nowiki>[[Connecting to SNU-Secure Wi-Fi]]</nowiki> * <nowiki>[[Hostel IoT & Gaming Device Setup]]</nowiki> * <nowiki>[[Blackboard LMS Guide for Students]]</nowiki> * <nowiki>[[PeopleSoft Student Portal Support]]</nowiki> * <nowiki>[[Campus Printing via PaperCut]]</nowiki> | width="33%" style="vertical-align:top; background:#f8f9fa; border:1px solid #dee2e6; padding:15px; border-radius:4px;" | === π Faculty & Staff Hub === * <nowiki>[[Classroom AV & Hybrid Teaching Guide]]</nowiki> * <nowiki>[[PeopleSoft HR & Finance Portals]]</nowiki> * <nowiki>[[Microsoft Teams & M365 Setup]]</nowiki> * <nowiki>[[VPN Remote Access (FortiClient)]]</nowiki> * <nowiki>[[Software Licensing & MATLAB Keys]]</nowiki> * <nowiki>[[Guest Wi-Fi Coupon Generation]]</nowiki> | width="33%" style="vertical-align:top; background:#f8f9fa; border:1px solid #dee2e6; padding:15px; border-radius:4px;" | === π¨ Need Immediate Help? === * <nowiki>'''</nowiki>IT Help Desk Location:<nowiki>'''</nowiki> Central Library, Ground Floor * <nowiki>'''</nowiki>Intercom Extension:<nowiki>'''</nowiki> Ext. 411 / 412 * <nowiki>'''</nowiki>Email Support:<nowiki>'''</nowiki> <nowiki>[mailto:ithelpdesk@snu.edu.in ithelpdesk@snu.edu.in]</nowiki> * <nowiki>'''</nowiki>Raise a Ticket:<nowiki>'''</nowiki> <nowiki>[https://itsupport.snu.edu.in SNU IT Helpdesk Portal]</nowiki> * <nowiki>'''</nowiki>Operating Hours:<nowiki>'''</nowiki> Mon-Sat: 09:00 AM - 06:00 PM |} --- === π οΈ Core Infrastructure & Security Categories === {| class="wikitable" style="width:100%; border:none; background:none;" |- | width="50%" style="border:1px solid #dee2e6; padding:12px;" | <nowiki>'''</nowiki><nowiki>[[File:Lock-icon.png|32px|vertical-align=middle]]</nowiki> Information Security<nowiki>'''</nowiki> * <nowiki>[[Setting up Multi-Factor Authentication (MFA)]]</nowiki> * <nowiki>[[Reporting Phishing and Suspicious Emails]]</nowiki> * <nowiki>[[Data Classification & Policy Compliance]]</nowiki> | width="50%" style="border:1px solid #dee2e6; padding:12px;" | <nowiki>'''</nowiki><nowiki>[[File:Network-icon.png|32px|vertical-align=middle]]</nowiki> Infrastructure & Assets<nowiki>'''</nowiki> * <nowiki>[[Campus Telephony & VoIP Guide]]</nowiki> * <nowiki>[[Hardware Procurement Recommended Specs]]</nowiki> * <nowiki>[[Laptop Repair & Loaner Device Policy]]</nowiki> |}</div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/FAQ_Batch_Jobs&diff=1188
Magus02/FAQ Batch Jobs
2026-04-20T06:46:26Z
<p>Deepak: Created page with "{{DISPLAYTITLE:FAQ: Batch Jobs β Magus02 HPC}} <div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;..."</p>
<hr />
<div>{{DISPLAYTITLE:FAQ: Batch Jobs β Magus02 HPC}}<br />
<div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-family:monospace;color:#5ba3d9;"><br />
π [[Magus02/Knowledge_Base|Magus02 Knowledge Base]] β HPC User β FAQ: Batch Jobs<br />
</div><br />
<br />
This page covers the most common problems and misunderstandings when submitting jobs to Slurm on Magus02. All examples use Slurm syntax.<br />
<br />
__TOC__<br />
<br />
== Why do I have to specify resource requirements? ==<br />
<br />
The Slurm scheduler needs to know at least three things about every job to decide where and when to run it:<br />
<br />
* '''Runtime''' β how long the job will run<br />
* '''CPU cores''' β how many processing units are needed<br />
* '''Memory''' β how much RAM is required<br />
<br />
Without these, Slurm cannot place your job correctly. For example, if you omit <code>--mem</code>, a job requiring 500 GB of RAM might be scheduled to a node with only 64 GB, causing it to crash immediately.<br />
<br />
Think of Slurm as playing '''multidimensional Tetris''' β it needs to know the shape of your job (its resource footprint) to fit it efficiently into the available cluster capacity.<br />
<br />
<div style="background:#0d1a0d;border-left:4px solid #39d353;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#80b880;"><br />
β
<strong>Minimum required directives for every job:</strong><br><br />
<code>#SBATCH --partition=</code> (which queue)<br><br />
<code>#SBATCH --time=</code> (wall clock limit)<br><br />
<code>#SBATCH --mem=</code> or <code>--mem-per-cpu=</code> (memory)<br><br />
<code>#SBATCH --ntasks=</code> or <code>--nodes=</code> (compute resources)<br />
</div><br />
<br />
----<br />
<br />
== My job starts but exits immediately with no output β what's wrong? ==<br />
<br />
'''Most likely cause:''' The output/error directory does not exist.<br />
<br />
Slurm writes your <code>stdout</code> and <code>stderr</code> to files before your commands run. If the target directory does not exist, Slurm cannot open the file and immediately kills the job.<br />
<br />
Check your directives:<br />
<br />
<pre><br />
#SBATCH --output=/path/to/output/directory/%j.out<br />
#SBATCH --error=/path/to/error/directory/%j.err<br />
</pre><br />
<br />
The directory <code>/path/to/output/directory/</code> must exist before you submit the job. You '''cannot''' create it inside the jobscript with <code>mkdir</code> β the directory must exist when Slurm tries to open the output file, which happens before any of your script commands run.<br />
<br />
'''Fix:'''<br />
<br />
<pre><br />
# Create the directory before submitting:<br />
$ mkdir -p /path/to/output/directory/<br />
$ sbatch myjobscript.sh<br />
</pre><br />
<br />
----<br />
<br />
== My job sometimes runs fine, sometimes fails for no apparent reason β why? ==<br />
<br />
'''Most likely cause:''' You are relying on modules loaded in your interactive session rather than in the jobscript.<br />
<br />
When you load modules on the login node before submitting, those modules may or may not be inherited by the batch job β this is unreliable and system-dependent. Your job's success should never depend on what you happened to have loaded in your terminal.<br />
<br />
'''Fix:''' Begin every jobscript with:<br />
<br />
<pre><br />
module purge<br />
module load <every module your job needs><br />
</pre><br />
<br />
This ensures your job always loads exactly the right software, regardless of your interactive session state. It also makes your jobs '''reproducible''' β you can re-submit them months later and get the same result.<br />
<br />
----<br />
<br />
== I get "srun: Job step creation temporarily disabled" and my job times out doing nothing β why? ==<br />
<br />
'''Cause:''' Nested calls to <code>srun</code> or <code>mpirun</code> inside the same job.<br />
<br />
This happens when your jobscript calls <code>srun ./myprogram</code>, but <code>myprogram</code> is itself a script that calls <code>srun</code> or <code>mpirun</code> again internally. The inner call tries to allocate resources that the outer <code>srun</code> has already taken β causing a deadlock.<br />
<br />
<pre><br />
# Problematic jobscript:<br />
#!/bin/bash<br />
#SBATCH ...<br />
srun ./run_simulation.sh # if run_simulation.sh calls mpirun, this deadlocks!<br />
</pre><br />
<br />
'''Fix:''' Check whether your program or wrapper script already invokes <code>mpirun</code>/<code>srun</code> internally:<br />
<br />
* If it does: remove the outer <code>srun</code> and call the script directly:<br />
<pre>./run_simulation.sh</pre><br />
<br />
* If your program is a true MPI binary (not a wrapper): keep <code>srun</code> or <code>mpirun</code>:<br />
<pre>mpirun -n $SLURM_NTASKS ./my_mpi_binary</pre><br />
<br />
----<br />
<br />
== My job is reported as COMPLETED but my scientific program actually failed β why? ==<br />
<br />
'''Cause:''' Slurm determines job success or failure from the '''exit code of your jobscript''', not from the exit code of programs called within it.<br />
<br />
The exit code of the whole script is the exit code of its '''last command'''. If you have commands after your main program (e.g. a file copy), their exit code overwrites your program's.<br />
<br />
=== Bad example ===<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH ...<br />
./my_scientific_program input.dat # fails with exit code 1<br />
cp results.dat $HOME/archive/ # succeeds with exit code 0<br />
# Slurm sees exit code 0 β marks job as COMPLETED, even though the program failed!<br />
</pre><br />
<br />
=== Correct approach: save and re-use the exit code ===<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH ...<br />
<br />
./my_scientific_program input.dat<br />
EXITCODE=$? # capture exit code immediately<br />
<br />
# Post-processing and cleanup:<br />
cp results.dat $HOME/archive/<br />
echo "Job finished at $(date)"<br />
<br />
exit $EXITCODE # report actual program success/failure to Slurm<br />
</pre><br />
<br />
Now Slurm will correctly show FAILED if your scientific program failed, even if all post-processing steps succeeded.<br />
<br />
----<br />
<br />
== My job is stuck in PD (Pending) β when will it run? ==<br />
<br />
A job stays Pending for several possible reasons:<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Reason Code (squeue -u $USER)<br />
! style="background:#0d1b2a;color:#94a8be;" | Meaning<br />
! style="background:#0d1b2a;color:#94a8be;" | Action<br />
|-<br />
| <code>Resources</code> || Waiting for enough nodes/cores to be free || Wait β will run when resources are available<br />
|-<br />
| <code>Priority</code> || Higher-priority jobs ahead in the queue || Wait β or consider using a lower-priority queue like <code>low/long</code><br />
|-<br />
| <code>QOSMaxJobsPerUser</code> || You have hit the maximum number of running jobs for your queue || Wait for one of your running jobs to finish<br />
|-<br />
| <code>QOSMaxCpuPerUser</code> || You have hit the core limit for your user in this partition || Request fewer cores, or wait<br />
|-<br />
| <code>InvalidQOS</code> or <code>PartitionNodeLimit</code> || You requested more resources than the partition allows || Reduce <code>--nodes</code>, <code>--ntasks</code>, or <code>--mem</code>; check partition limits<br />
|}<br />
<br />
Check why your job is pending:<br />
<br />
<pre><br />
$ squeue -u $USER -o "%.10i %.12j %.8T %.12R"<br />
# %R shows the reason code<br />
</pre><br />
<br />
----<br />
<br />
== How do I check how much memory my job actually used? ==<br />
<br />
After your job completes, use <code>sacct</code>:<br />
<br />
<pre><br />
# Show memory usage and elapsed time for a completed job:<br />
$ sacct -j JOB_ID --format=JobID,Elapsed,MaxRSS,MaxVMSize,State,ExitCode<br />
<br />
# MaxRSS = peak real memory used (in kilobytes)<br />
# MaxVMSize = peak virtual memory used<br />
</pre><br />
<br />
Use this information to tune your <code>--mem</code> requests for future jobs β requesting too much wastes allocation; requesting too little risks OOM (Out Of Memory) kills.<br />
<br />
----<br />
<br />
== References ==<br />
<br />
* [[Magus02/Batch_Scheduler|Batch Scheduler β Job Submission Guide]]<br />
* [[Magus02/Scheduling_Basics|Scheduling Basics]]<br />
* [[Magus02/Modules|Environment Modules]]<br />
* [[Magus02|Magus02 Main Page β Queue Structure]]<br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;"><br />
[[Magus02/Knowledge_Base|β Back to Knowledge Base]] Β· Maintained by HPC Administration Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/NUMA&diff=1187
Magus02/NUMA
2026-04-20T06:45:23Z
<p>Deepak: Created page with "{{DISPLAYTITLE:NUMA Architecture β Magus02 HPC}} <div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13p..."</p>
<hr />
<div>{{DISPLAYTITLE:NUMA Architecture β Magus02 HPC}}<br />
<div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-family:monospace;color:#5ba3d9;"><br />
π [[Magus02/Knowledge_Base|Magus02 Knowledge Base]] β HPC User β NUMA Architecture<br />
</div><br />
<br />
NUMA (Non-Uniform Memory Access) is the memory architecture used in Magus02's compute nodes. Understanding it helps you write programs that achieve maximum memory bandwidth and avoid hidden performance bottlenecks.<br />
<br />
__TOC__<br />
<br />
== What is NUMA? ==<br />
<br />
A standard desktop computer has one CPU and one block of main memory β all memory accesses take roughly the same time. A '''NUMA system''' (like Magus02's nodes) has '''multiple CPU sockets''', each with its own local block of memory, connected by a high-speed interconnect.<br />
<br />
Key properties:<br />
* Every core on every socket '''can access all memory''' β it is still a shared-memory system<br />
* Accessing '''local memory''' (same socket) is '''fast'''<br />
* Accessing '''remote memory''' (different socket, via interconnect) is '''slower'''<br />
* The name "Non-Uniform Memory Access" reflects this difference in access latency<br />
<br />
=== Magus02 Node Topology ===<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Node Type<br />
! style="background:#0d1b2a;color:#94a8be;" | Processor<br />
! style="background:#0d1b2a;color:#94a8be;" | Sockets<br />
! style="background:#0d1b2a;color:#94a8be;" | Cores/Socket<br />
! style="background:#0d1b2a;color:#94a8be;" | Local RAM/Socket<br />
! style="background:#0d1b2a;color:#94a8be;" | NUMA Domains<br />
|-<br />
| Compute Node || AMD EPYC 7763 || 2 || 64 || 256 GB || 2 (minimum; EPYC has up to 8 per chip)<br />
|-<br />
| High Memory Node || AMD EPYC 7543 || 2 || 32 || 512 GB || 2+<br />
|-<br />
| GPU Node || Intel Xeon Platinum 8368 || 2 || 32 || 256 GB || 2<br />
|}<br />
<br />
<div style="background:#0d1a2a;border-left:4px solid #00c9ff;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#94a8be;"><br />
π‘ <strong>AMD EPYC specifics:</strong> AMD EPYC "Milan" (7763) and "Rome" (7543) processors use a chiplet design with up to 8 internal NUMA domains per physical socket (called CCD or "core complex die"). This means even a single-socket view has multiple memory latency tiers. Use <code>numactl --hardware</code> on a node to see the exact topology.<br />
</div><br />
<br />
Check the NUMA topology of a node:<br />
<br />
<pre><br />
# From an interactive session on a compute node:<br />
$ numactl --hardware<br />
$ numactl --show<br />
$ lstopo # graphical topology (requires X11)<br />
</pre><br />
<br />
== Why NUMA Matters for Your Code ==<br />
<br />
Two performance pitfalls arise from being NUMA-unaware:<br />
<br />
=== Pitfall 1: Thread Migration ===<br />
<br />
The Linux operating system is allowed to move threads between CPU cores to balance load. On a NUMA system, if a thread gets migrated from Socket 0 to Socket 1, it is now separated from its data (which was allocated on Socket 0's local memory). Every memory access then goes over the slow interconnect.<br />
<br />
'''Solution: Thread pinning''' β bind each thread to a fixed core so the OS cannot migrate it.<br />
<br />
=== Pitfall 2: Wrong Data Placement (First-Touch Policy) ===<br />
<br />
When memory is allocated in C/Fortran (e.g. with <code>malloc</code> or array declaration), no physical memory is assigned yet β only virtual addresses. The operating system allocates the actual physical memory pages the first time each page is ''written'' (the "first touch"). Pages are placed in the local memory of the socket where the first-touching thread runs.<br />
<br />
If you initialise all your arrays in the main thread (on Socket 0) before spawning OpenMP threads, all memory lands on Socket 0. Threads on Socket 1 then always access remote memory β severely limiting bandwidth.<br />
<br />
'''Solution: Initialise data in parallel''', using the same thread distribution you will use for computation.<br />
<br />
=== NUMA-Aware Array Initialisation (OpenMP) ===<br />
<br />
<pre><br />
// WRONG β all data initialised by main thread β lands on Socket 0:<br />
for (int i = 0; i < N; i++) {<br />
a[i] = 0.0;<br />
b[i] = i;<br />
}<br />
#pragma omp parallel for<br />
for (int i = 0; i < N; i++) {<br />
a[i] = a[i] + b[i]; // threads on Socket 1 hit remote memory!<br />
}<br />
<br />
<br />
// CORRECT β data initialised in parallel β distributed across sockets:<br />
#pragma omp parallel for<br />
for (int i = 0; i < N; i++) {<br />
a[i] = 0.0; // first-touch by the thread that will compute it<br />
b[i] = i;<br />
}<br />
#pragma omp parallel for<br />
for (int i = 0; i < N; i++) {<br />
a[i] = a[i] + b[i]; // each thread accesses its own local data<br />
}<br />
</pre><br />
<br />
== Thread Pinning on Magus02 ==<br />
<br />
=== OpenMP Pinning ===<br />
<br />
Set these environment variables in your jobscript or before running your program:<br />
<br />
<pre><br />
# Pin threads to cores, pack them close together (good for cache reuse):<br />
export OMP_PLACES=cores<br />
export OMP_PROC_BIND=close<br />
<br />
# Alternative: spread threads evenly across NUMA domains (good for bandwidth):<br />
export OMP_PLACES=sockets<br />
export OMP_PROC_BIND=spread<br />
</pre><br />
<br />
=== numactl β Manual Process Binding ===<br />
<br />
For serial or MPI programs, use <code>numactl</code> to bind a process to specific NUMA nodes:<br />
<br />
<pre><br />
# Run program using only Socket 0's cores and memory:<br />
$ numactl --cpunodebind=0 --membind=0 ./my_program<br />
<br />
# Run on Socket 1 only:<br />
$ numactl --cpunodebind=1 --membind=1 ./my_program<br />
<br />
# Run using all cores but memory local to the running thread:<br />
$ numactl --localalloc ./my_program<br />
</pre><br />
<br />
=== MPI Pinning ===<br />
<br />
See [[Magus02/MPI_Usage#Process_Binding|MPI Usage β Process Binding]] for binding MPI ranks to specific NUMA domains using Open MPI and Intel MPI options.<br />
<br />
== Checking Memory Bandwidth ==<br />
<br />
The performance difference between local and remote memory access can be significant (often 2β3Γ). You can benchmark it using the STREAM benchmark if available on the cluster:<br />
<br />
<pre><br />
$ module load intel/oneapi<br />
$ icc -O3 -qopenmp -march=native stream.c -o stream<br />
$ OMP_NUM_THREADS=64 OMP_PROC_BIND=close ./stream<br />
</pre><br />
<br />
== References ==<br />
<br />
* [https://software.intel.com/en-us/articles/optimizing-applications-for-numa Intel: Optimizing Applications for NUMA]<br />
* [[Magus02/OpenMP_Usage|OpenMP Usage β Thread Pinning]]<br />
* [[Magus02/MPI_Usage|MPI Usage β Process Binding]]<br />
* [[Magus02/Batch_Scheduler|Batch Scheduler β Hybrid Jobs]]<br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;"><br />
[[Magus02/Knowledge_Base|β Back to Knowledge Base]] Β· Maintained by HPC Administration Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/MPI_Usage&diff=1186
Magus02/MPI Usage
2026-04-20T06:44:11Z
<p>Deepak: Created page with "{{DISPLAYTITLE:MPI Usage β Magus02 HPC}} <div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-f..."</p>
<hr />
<div>{{DISPLAYTITLE:MPI Usage β Magus02 HPC}}<br />
<div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-family:monospace;color:#5ba3d9;"><br />
π [[Magus02/Knowledge_Base|Magus02 Knowledge Base]] β HPC User β MPI Usage<br />
</div><br />
<br />
MPI (Message Passing Interface) is the standard for '''distributed-memory parallel programming''' β running a program as multiple independent processes that communicate by passing messages, potentially across many compute nodes.<br />
<br />
__TOC__<br />
<br />
== What is MPI? ==<br />
<br />
MPI programs spawn multiple '''processes''' (as opposed to OpenMP's threads), each with its own separate memory space. Processes coordinate by explicitly sending and receiving messages. This allows MPI programs to scale across dozens or hundreds of nodes, making it the dominant model for large-scale HPC workloads.<br />
<br />
On Magus02:<br />
* Two MPI libraries are available: '''Open MPI''' and '''Intel MPI'''<br />
* Never load both at the same time β they conflict<br />
* MPI is always loaded via the [[Magus02/Modules|module system]]<br />
<br />
<div style="background:#2a1a00;border-left:4px solid #f0c040;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#d4b870;"><br />
β οΈ <strong>Critical:</strong> Load exactly one MPI module. Loading both <code>mpi/openmpi</code> and <code>mpi/intelmpi</code> simultaneously will cause conflicts and unpredictable failures. Use <code>module purge</code> at the start of every jobscript.<br />
</div><br />
<br />
== Loading MPI Modules ==<br />
<br />
=== Open MPI ===<br />
<br />
<pre><br />
$ module purge<br />
$ module load gcc/11.2.0<br />
$ module load mpi/openmpi<br />
</pre><br />
<br />
=== Intel MPI ===<br />
<br />
<pre><br />
$ module purge<br />
$ module load intel/oneapi<br />
$ module load mpi/intelmpi<br />
</pre><br />
<br />
== Compiling MPI Code ==<br />
<br />
MPI provides '''compiler wrappers''' that automatically include the correct headers and libraries. Always use these wrappers instead of calling <code>gcc</code> or <code>icc</code> directly.<br />
<br />
=== Open MPI Compiler Wrappers ===<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Language<br />
! style="background:#0d1b2a;color:#94a8be;" | Wrapper<br />
! style="background:#0d1b2a;color:#94a8be;" | Example<br />
|-<br />
| C || <code>mpicc</code> || <code>mpicc -O2 myprog.c -o myprog</code><br />
|-<br />
| C++ || <code>mpicxx</code> || <code>mpicxx -O2 myprog.cpp -o myprog</code><br />
|-<br />
| Fortran || <code>mpifort</code> || <code>mpifort -O2 myprog.f90 -o myprog</code><br />
|}<br />
<br />
=== Intel MPI Compiler Wrappers ===<br />
<br />
Intel MPI ships '''two sets''' of wrappers β one for GCC and one for Intel compilers. Use the right set for your code.<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Underlying Compiler<br />
! style="background:#0d1b2a;color:#94a8be;" | C<br />
! style="background:#0d1b2a;color:#94a8be;" | C++<br />
! style="background:#0d1b2a;color:#94a8be;" | Fortran<br />
|-<br />
| GCC-based || <code>mpicc</code> || <code>mpicxx</code> || <code>mpifort</code><br />
|-<br />
| Intel-based || <code>mpiicc</code> || <code>mpiicpc</code> || <code>mpiifort</code><br />
|}<br />
<br />
Example with Intel compilers:<br />
<br />
<pre><br />
$ module purge<br />
$ module load intel/oneapi mpi/intelmpi<br />
<br />
$ mpiicc -O2 myprog.c -o myprog # C with Intel compiler<br />
$ mpiicpc -O2 myprog.cpp -o myprog # C++ with Intel compiler<br />
$ mpiifort -O2 myprog.f90 -o myprog # Fortran with Intel compiler<br />
</pre><br />
<br />
On most systems, environment variables are also available:<br />
<br />
<pre><br />
$ $MPICC myprog.c -O2 -o myprog<br />
$ $MPICXX myprog.cpp -O2 -o myprog<br />
$ $MPIFC myprog.f90 -O2 -o myprog<br />
</pre><br />
<br />
== Running MPI Programs ==<br />
<br />
=== Basic Launch ===<br />
<br />
<pre><br />
# General form:<br />
$ mpirun -n <num_processes> [options] ./my_program [program_args]<br />
<br />
# Example: run with 256 MPI processes:<br />
$ mpirun -n 256 ./my_mpi_program input.dat<br />
</pre><br />
<br />
Note: <code>mpirun</code> and <code>mpiexec</code> are synonymous in Open MPI. In Intel MPI it is <code>mpiexec.hydra</code> and <code>mpirun</code>.<br />
<br />
=== Key mpirun Options ===<br />
<br />
==== Open MPI ====<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Option<br />
! style="background:#0d1b2a;color:#94a8be;" | Description<br />
|-<br />
| <code>-n <N></code> or <code>-np <N></code> || Total number of MPI processes<br />
|-<br />
| <code>-npernode <N></code> || Number of processes per node<br />
|-<br />
| <code>-npersocket <N></code> || Number of processes per socket<br />
|-<br />
| <code>-wdir <dir></code> || Change working directory before execution<br />
|-<br />
| <code>-x VAR</code> || Export environment variable to remote processes<br />
|-<br />
| <code>-output-filename <name></code> || Redirect output to files named <name>.<rank><br />
|-<br />
| <code>--help</code> || List all available options<br />
|}<br />
<br />
==== Intel MPI ====<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Option<br />
! style="background:#0d1b2a;color:#94a8be;" | Description<br />
|-<br />
| <code>-n <N></code> || Total number of MPI processes<br />
|-<br />
| <code>-ppn <N></code> || Processes per node (set <code>I_MPI_JOB_RESPECT_PROCESS_PLACEMENT=off</code> if needed)<br />
|-<br />
| <code>-wdir <dir></code> || Change working directory<br />
|-<br />
| <code>-outfile-pattern <name></code> || Redirect stdout to file<br />
|-<br />
| <code>-g</code> || Enable debug symbols<br />
|-<br />
| <code>-O2</code> / <code>-O3</code> || Optimization level<br />
|}<br />
<br />
== Complete Slurm Jobscript β MPI ==<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH --job-name=mpi_vasp<br />
#SBATCH --partition=medium<br />
#SBATCH --nodes=4<br />
#SBATCH --ntasks-per-node=64<br />
#SBATCH --mem=512G<br />
#SBATCH --time=7-00:00:00<br />
#SBATCH --output=vasp_%j.out<br />
#SBATCH --error=vasp_%j.err<br />
#SBATCH --mail-type=END,FAIL<br />
#SBATCH --mail-user=your_email@snu.edu.in<br />
<br />
module purge<br />
module load intel/oneapi<br />
module load mpi/intelmpi<br />
module load mkl<br />
<br />
# Run with total tasks = nodes Γ ntasks-per-node = 256:<br />
mpirun -n $SLURM_NTASKS ./vasp_std<br />
</pre><br />
<br />
== Process Binding ==<br />
<br />
Binding MPI processes to specific CPU cores improves performance by ensuring each process stays close to its local memory (NUMA-awareness). Both Open MPI and Intel MPI support binding.<br />
<br />
<div style="background:#2a1a00;border-left:4px solid #f0c040;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#d4b870;"><br />
β οΈ <strong>Multi-job binding conflict:</strong> MPI binding is <strong>on by default</strong> in most implementations. If you run more than one MPI job on the same hardware simultaneously (e.g. in a non-exclusive allocation), all jobs assume they are the only job and bind themselves to the same cores β resulting in <em>1/N</em> performance while other cores sit idle.<br />
</div><br />
<br />
=== Open MPI β Binding Options ===<br />
<br />
<pre><br />
# Bind one process per core:<br />
$ mpirun -n 64 --bind-to core ./my_mpi_program<br />
<br />
# Bind one process per socket:<br />
$ mpirun -n 8 --bind-to socket ./my_mpi_program<br />
<br />
# Report binding (for verification):<br />
$ mpirun -n 64 --bind-to core --report-bindings ./my_mpi_program 2>&1 | head -20<br />
</pre><br />
<br />
=== Intel MPI β Binding Options ===<br />
<br />
<pre><br />
# Bind to cores:<br />
$ export I_MPI_PIN=1<br />
$ export I_MPI_PIN_DOMAIN=core<br />
$ mpirun -n 64 ./my_mpi_program<br />
<br />
# Check binding:<br />
$ export I_MPI_DEBUG=4<br />
$ mpirun -n 4 ./my_mpi_program<br />
</pre><br />
<br />
== References ==<br />
<br />
* [[Magus02/NUMA|NUMA Architecture β Memory Locality]]<br />
* [[Magus02/Batch_Scheduler|Batch Scheduler β MPI Jobscript]]<br />
* [[Magus02/OpenMP_Usage|OpenMP Usage β Hybrid Jobs]]<br />
* [[Magus02/Compiler|Compilers on Magus02]]<br />
* [https://www.open-mpi.org/doc/v4.0/man1/mpiexec.1.php Open MPI mpiexec man page]<br />
* [https://software.intel.com/content/www/us/en/develop/documentation/mpi-developer-reference-linux Intel MPI Reference]<br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;"><br />
[[Magus02/Knowledge_Base|β Back to Knowledge Base]] Β· Maintained by HPC Administration Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/OpenMP_Usage&diff=1185
Magus02/OpenMP Usage
2026-04-20T06:43:09Z
<p>Deepak: Created page with "{{DISPLAYTITLE:OpenMP Usage β Magus02 HPC}} <div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;fon..."</p>
<hr />
<div>{{DISPLAYTITLE:OpenMP Usage β Magus02 HPC}}<br />
<div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-family:monospace;color:#5ba3d9;"><br />
π [[Magus02/Knowledge_Base|Magus02 Knowledge Base]] β HPC User β OpenMP Usage<br />
</div><br />
<br />
OpenMP (Open Multi-Processing) is the standard API for '''shared-memory parallel programming''' on multi-core processors. It uses compiler directives (pragmas) to parallelize loops and code regions across multiple threads on a single node.<br />
<br />
__TOC__<br />
<br />
== What is OpenMP? ==<br />
<br />
OpenMP allows a program to use multiple CPU cores within a single compute node by spawning '''threads''' that work simultaneously on different parts of the data. Unlike [[Magus02/MPI_Usage|MPI]], OpenMP threads share the same memory space β no message passing is needed.<br />
<br />
On Magus02:<br />
* Each AMD EPYC 7763 Compute Node has '''128 cores''' β ideal for large OpenMP thread counts<br />
* Each AMD EPYC 7543 High Memory Node has '''64 cores'''<br />
* OpenMP does '''not''' scale across multiple nodes β use MPI or Hybrid jobs for that<br />
<br />
<div style="background:#0d1a2a;border-left:4px solid #00c9ff;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#94a8be;"><br />
π‘ No additional module is needed for OpenMP itself β OpenMP support is built into the compiler. You simply need to load your compiler module (Intel or GCC) and add the appropriate flag.<br />
</div><br />
<br />
== Compiling OpenMP Code ==<br />
<br />
Add the OpenMP flag for your compiler when compiling:<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Compiler<br />
! style="background:#0d1b2a;color:#94a8be;" | Flag<br />
! style="background:#0d1b2a;color:#94a8be;" | Example Command<br />
|-<br />
| GNU (<code>gcc</code> / <code>gfortran</code>) || <code>-fopenmp</code> || <code>gcc -fopenmp -O2 mycode.c -o myprogram</code><br />
|-<br />
| Intel (<code>icc</code> / <code>ifort</code>) || <code>-qopenmp</code> || <code>icc -qopenmp -O2 mycode.c -o myprogram</code><br />
|-<br />
| Clang || <code>-fopenmp</code> || <code>clang -fopenmp -O2 mycode.c -o myprogram</code><br />
|-<br />
| Oracle Studio || <code>-xopenmp</code> || <code>cc -xopenmp -O2 mycode.c -o myprogram</code><br />
|-<br />
| NAG Fortran || <code>-openmp</code> || <code>nagfor -openmp -O2 mycode.f90 -o myprogram</code><br />
|}<br />
<br />
Without the OpenMP flag, all <code>#pragma omp</code> directives in your code are silently ignored and the program runs serially.<br />
<br />
=== Example: Compiling with Intel compiler ===<br />
<br />
<pre><br />
$ module purge<br />
$ module load intel/oneapi<br />
<br />
# Compile an OpenMP C program:<br />
$ icc -qopenmp -O2 -march=native omp_program.c -o omp_program<br />
<br />
# Compile an OpenMP Fortran program:<br />
$ ifort -qopenmp -O2 -march=native omp_program.f90 -o omp_program<br />
</pre><br />
<br />
=== Example: Compiling with GCC ===<br />
<br />
<pre><br />
$ module purge<br />
$ module load gcc/11.2.0<br />
<br />
$ gcc -fopenmp -O2 -march=native omp_program.c -o omp_program<br />
</pre><br />
<br />
== Running an OpenMP Program ==<br />
<br />
=== Setting OMP_NUM_THREADS ===<br />
<br />
'''Always set <code>OMP_NUM_THREADS</code>''' before running an OpenMP program. If unset, behaviour depends on the system default β sometimes it defaults to 1 (serial), sometimes to all available cores (potentially overloading the node).<br />
<br />
Set it for a single execution:<br />
<br />
<pre><br />
$ OMP_NUM_THREADS=32 ./omp_program<br />
</pre><br />
<br />
Or export it to the environment for the session:<br />
<br />
<pre><br />
$ export OMP_NUM_THREADS=64<br />
$ ./omp_program<br />
</pre><br />
<br />
In a Slurm jobscript, tie it to the allocated cores:<br />
<br />
<pre><br />
export OMP_NUM_THREADS=$SLURM_CPUS_PER_TASK<br />
</pre><br />
<br />
=== Complete Slurm Jobscript for OpenMP ===<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH --job-name=openmp_run<br />
#SBATCH --partition=medium<br />
#SBATCH --nodes=1<br />
#SBATCH --ntasks=1<br />
#SBATCH --cpus-per-task=64<br />
#SBATCH --mem=256G<br />
#SBATCH --time=06:00:00<br />
#SBATCH --output=omp_%j.out<br />
#SBATCH --error=omp_%j.err<br />
<br />
module purge<br />
module load intel/oneapi<br />
<br />
# Set threads to match allocated cores:<br />
export OMP_NUM_THREADS=$SLURM_CPUS_PER_TASK<br />
<br />
# Thread placement for NUMA-awareness:<br />
export OMP_PLACES=cores<br />
export OMP_PROC_BIND=close<br />
<br />
./omp_program input.dat<br />
</pre><br />
<br />
== Thread Pinning ==<br />
<br />
On Magus02's AMD EPYC nodes, each node has '''multiple NUMA domains''' (memory regions local to groups of cores). Pinning OpenMP threads to specific cores prevents the operating system from migrating threads between cores or NUMA domains, improving memory locality and performance.<br />
<br />
Key environment variables:<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! Variable !! Values !! Effect<br />
|-<br />
| <code>OMP_PLACES</code> || <code>cores</code>, <code>threads</code>, <code>sockets</code> || Defines the "places" threads can be bound to<br />
|-<br />
| <code>OMP_PROC_BIND</code> || <code>close</code>, <code>spread</code>, <code>master</code> || Strategy for distributing threads across places<br />
|}<br />
<br />
Recommended for Magus02 (maximises cache locality):<br />
<br />
<pre><br />
export OMP_PLACES=cores<br />
export OMP_PROC_BIND=close<br />
</pre><br />
<br />
For jobs that benefit from spreading across NUMA domains:<br />
<br />
<pre><br />
export OMP_PLACES=sockets<br />
export OMP_PROC_BIND=spread<br />
</pre><br />
<br />
See [[Magus02/NUMA|NUMA Architecture]] for deeper explanation of why this matters on multi-socket nodes.<br />
<br />
== Verifying Parallelism ==<br />
<br />
After launching, check that threads are actually running in parallel:<br />
<br />
<pre><br />
# From a separate terminal while the job runs (replace NODE with actual node name):<br />
$ ssh NODE<br />
$ top<br />
# You should see your program using well over 100% CPU (e.g. 6400% for 64 threads)<br />
</pre><br />
<br />
Within your program, you can print the thread count:<br />
<br />
<pre><br />
#include <omp.h><br />
#include <stdio.h><br />
<br />
int main() {<br />
#pragma omp parallel<br />
{<br />
int tid = omp_get_thread_num();<br />
int nthreads = omp_get_num_threads();<br />
if (tid == 0)<br />
printf("Running with %d threads\n", nthreads);<br />
}<br />
return 0;<br />
}<br />
</pre><br />
<br />
== References ==<br />
<br />
* [[Magus02/NUMA|NUMA Architecture β Thread Pinning]]<br />
* [[Magus02/Batch_Scheduler|Batch Scheduler β OpenMP Jobscript]]<br />
* [[Magus02/MPI_Usage|MPI Usage β Distributed Parallelism]]<br />
* [[Magus02/Compiler|Compilers on Magus02]]<br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;"><br />
[[Magus02/Knowledge_Base|β Back to Knowledge Base]] Β· Maintained by HPC Administration Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/Batch_Scheduler&diff=1184
Magus02/Batch Scheduler
2026-04-20T06:41:21Z
<p>Deepak: new</p>
<hr />
<div>{{DISPLAYTITLE:Batch Scheduler β Magus02 HPC}}<br />
<div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-family:monospace;color:#5ba3d9;"><br />
π [[Magus02/Knowledge_Base|Magus02 Knowledge Base]] β HPC User β Batch Scheduler<br />
</div><br />
<br />
This page explains how to write and submit jobs to the Slurm batch scheduler on Magus02. For the theory behind scheduling, see [[Magus02/Scheduling_Basics|Scheduling Basics]].<br />
<br />
__TOC__<br />
<br />
== Overview ==<br />
<br />
All compute work on Magus02 must go through the '''Slurm''' batch scheduler. You write a '''jobscript''' β a shell script that declares resource requirements and the commands to execute β and submit it with <code>sbatch</code>. Slurm queues the job, waits for resources, and runs it on compute nodes.<br />
<br />
<div style="background:#2a1a00;border-left:4px solid #f0c040;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#d4b870;"><br />
β οΈ <strong>Common pitfalls to avoid:</strong><br><br />
β’ Requesting more memory than available β job stays in queue forever<br><br />
β’ Requesting less time than needed β job is killed before it finishes<br><br />
β’ Forgetting to load modules in jobscript β job fails silently<br><br />
β’ Running heavy computations on login nodes β impacts all users<br />
</div><br />
<br />
== Essential Slurm Commands ==<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Command<br />
! style="background:#0d1b2a;color:#94a8be;" | Description<br />
|-<br />
| <code>sbatch jobscript.sh</code> || Submit a jobscript to the queue<br />
|-<br />
| <code>squeue</code> || List all jobs currently in the queue<br />
|-<br />
| <code>squeue -u $USER</code> || List only your jobs<br />
|-<br />
| <code>squeue -p medium</code> || List jobs in a specific partition<br />
|-<br />
| <code>scancel JOB_ID</code> || Cancel a specific job<br />
|-<br />
| <code>scancel -u $USER</code> || Cancel all your jobs<br />
|-<br />
| <code>scontrol show job JOB_ID</code> || Show detailed info about a job<br />
|-<br />
| <code>sinfo</code> || Show partition and node status<br />
|-<br />
| <code>sinfo -p medium</code> || Show status of a specific partition<br />
|-<br />
| <code>sacct -j JOB_ID</code> || Show accounting info for a completed job<br />
|}<br />
<br />
== Common #SBATCH Directives ==<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Directive<br />
! style="background:#0d1b2a;color:#94a8be;" | Description<br />
|-<br />
| <code>#SBATCH --job-name=myjob</code> || Set a name for your job (visible in squeue)<br />
|-<br />
| <code>#SBATCH --partition=medium</code> || Choose the queue/partition<br />
|-<br />
| <code>#SBATCH --nodes=2</code> || Number of compute nodes<br />
|-<br />
| <code>#SBATCH --ntasks=128</code> || Total number of MPI tasks (processes)<br />
|-<br />
| <code>#SBATCH --ntasks-per-node=64</code> || MPI tasks per node<br />
|-<br />
| <code>#SBATCH --cpus-per-task=2</code> || CPU cores per task (for hybrid OpenMP+MPI)<br />
|-<br />
| <code>#SBATCH --mem=256G</code> || Total RAM per node<br />
|-<br />
| <code>#SBATCH --mem-per-cpu=4G</code> || RAM per CPU core<br />
|-<br />
| <code>#SBATCH --time=2-00:00:00</code> || Wall time limit (D-HH:MM:SS)<br />
|-<br />
| <code>#SBATCH --output=slurm-%j.out</code> || STDOUT file (%j = job ID)<br />
|-<br />
| <code>#SBATCH --error=slurm-%j.err</code> || STDERR file<br />
|-<br />
| <code>#SBATCH --mail-type=END,FAIL</code> || Send email when job ends or fails<br />
|-<br />
| <code>#SBATCH --mail-user=you@snu.edu.in</code> || Email address for notifications<br />
|}<br />
<br />
== Job Types ==<br />
<br />
=== 1. Serial Job (single core) ===<br />
<br />
For programs that use only one CPU core. Use the <code>small</code> partition.<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH --job-name=serial_test<br />
#SBATCH --partition=small<br />
#SBATCH --nodes=1<br />
#SBATCH --ntasks=1<br />
#SBATCH --mem=8G<br />
#SBATCH --time=02:00:00<br />
#SBATCH --output=serial_%j.out<br />
#SBATCH --error=serial_%j.err<br />
<br />
module purge<br />
module load intel/oneapi<br />
<br />
./my_serial_program input.dat<br />
</pre><br />
<br />
=== 2. Shared Memory Job (OpenMP) ===<br />
<br />
For programs parallelized with OpenMP β multiple threads on a single node.<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH --job-name=openmp_job<br />
#SBATCH --partition=medium<br />
#SBATCH --nodes=1<br />
#SBATCH --ntasks=1<br />
#SBATCH --cpus-per-task=64<br />
#SBATCH --mem=256G<br />
#SBATCH --time=12:00:00<br />
#SBATCH --output=omp_%j.out<br />
#SBATCH --error=omp_%j.err<br />
<br />
module purge<br />
module load intel/oneapi<br />
<br />
export OMP_NUM_THREADS=$SLURM_CPUS_PER_TASK<br />
export OMP_PLACES=cores<br />
export OMP_PROC_BIND=close<br />
<br />
./my_openmp_program<br />
</pre><br />
<br />
=== 3. Distributed Memory Job (MPI) ===<br />
<br />
For programs parallelized with MPI β multiple processes across one or more nodes.<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH --job-name=mpi_job<br />
#SBATCH --partition=medium<br />
#SBATCH --nodes=4<br />
#SBATCH --ntasks-per-node=64<br />
#SBATCH --mem=256G<br />
#SBATCH --time=7-00:00:00<br />
#SBATCH --output=mpi_%j.out<br />
#SBATCH --error=mpi_%j.err<br />
<br />
module purge<br />
module load intel/oneapi<br />
module load mpi/intelmpi<br />
<br />
mpirun -n $SLURM_NTASKS ./my_mpi_program input.dat<br />
</pre><br />
<br />
=== 4. Hybrid Job (MPI + OpenMP) ===<br />
<br />
For programs that use both MPI (across nodes) and OpenMP (within each node). Requires careful configuration of both thread counts and MPI binding.<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH --job-name=hybrid_job<br />
#SBATCH --partition=large<br />
#SBATCH --nodes=4<br />
#SBATCH --ntasks-per-node=8<br />
#SBATCH --cpus-per-task=16<br />
#SBATCH --mem=256G<br />
#SBATCH --time=14-00:00:00<br />
#SBATCH --output=hybrid_%j.out<br />
#SBATCH --error=hybrid_%j.err<br />
<br />
module purge<br />
module load intel/oneapi<br />
module load mpi/intelmpi<br />
<br />
export OMP_NUM_THREADS=$SLURM_CPUS_PER_TASK<br />
<br />
mpirun -n $SLURM_NTASKS ./my_hybrid_program<br />
</pre><br />
<br />
=== 5. GPU Job ===<br />
<br />
For CUDA or GPU-accelerated programs. Always use the <code>GPU</code> partition.<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH --job-name=gpu_job<br />
#SBATCH --partition=GPU<br />
#SBATCH --nodes=1<br />
#SBATCH --ntasks=16<br />
#SBATCH --gres=gpu:4<br />
#SBATCH --mem=256G<br />
#SBATCH --time=7-00:00:00<br />
#SBATCH --output=gpu_%j.out<br />
#SBATCH --error=gpu_%j.err<br />
<br />
module purge<br />
module load cuda<br />
module load intel/oneapi<br />
<br />
./my_cuda_program<br />
</pre><br />
<br />
=== 6. Array Job ===<br />
<br />
Run the same program multiple times with different inputs or parameters, all submitted as one job.<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH --job-name=array_job<br />
#SBATCH --partition=small<br />
#SBATCH --nodes=1<br />
#SBATCH --ntasks=8<br />
#SBATCH --mem=32G<br />
#SBATCH --time=04:00:00<br />
#SBATCH --array=1-10<br />
#SBATCH --output=array_%A_%a.out<br />
#SBATCH --error=array_%A_%a.err<br />
<br />
# $SLURM_ARRAY_TASK_ID is set to the array index (1..10)<br />
module purge<br />
module load intel/oneapi<br />
<br />
./my_program input_${SLURM_ARRAY_TASK_ID}.dat<br />
</pre><br />
<br />
<div style="background:#0d1a2a;border-left:4px solid #00c9ff;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#94a8be;"><br />
π‘ <strong>Array job tip:</strong> Use array jobs instead of submitting hundreds of individual <code>sbatch</code> calls. They are tracked as a single entity and are more scheduler-friendly. Each task sees a unique <code>$SLURM_ARRAY_TASK_ID</code> so you can differentiate inputs.<br />
</div><br />
<br />
=== 7. Interactive Session ===<br />
<br />
For testing and debugging interactively on a compute node (not the login node):<br />
<br />
<pre><br />
$ srun --pty --partition=small --nodes=1 --ntasks=8 --mem=32G --time=01:00:00 /bin/bash<br />
</pre><br />
<br />
This gives you a shell on a compute node. Exit with <code>exit</code> when done.<br />
<br />
== Monitoring Jobs ==<br />
<br />
<pre><br />
# Check the status of your jobs:<br />
$ squeue -u $USER<br />
<br />
# Output columns explained:<br />
# JOBID PARTITION NAME USER ST TIME NODES NODELIST<br />
# 12345 medium myjob deepak R 0:23 2 node[01-02]<br />
# Status: R=Running, PD=Pending, CG=Completing, F=Failed<br />
<br />
# Get detailed info on a specific job:<br />
$ scontrol show job 12345<br />
<br />
# Check completed job stats (CPU time, memory used):<br />
$ sacct -j 12345 --format=JobID,Elapsed,MaxRSS,State<br />
</pre><br />
<br />
== References ==<br />
<br />
* [[Magus02/Scheduling_Basics|Scheduling Basics β Theory]]<br />
* [[Magus02/FAQ_Batch_Jobs|FAQ: Batch Jobs β Troubleshooting]]<br />
* [[Magus02/MPI_Usage|MPI Usage]]<br />
* [[Magus02/OpenMP_Usage|OpenMP Usage]]<br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;"><br />
[[Magus02/Knowledge_Base|β Back to Knowledge Base]] Β· Maintained by HPC Administration Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/Compiler&diff=1183
Magus02/Compiler
2026-04-20T06:40:20Z
<p>Deepak: new</p>
<hr />
<div>{{DISPLAYTITLE:Compilers β Magus02 HPC}}<br />
<div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-family:monospace;color:#5ba3d9;"><br />
π [[Magus02/Knowledge_Base|Magus02 Knowledge Base]] β HPC User β Compilers<br />
</div><br />
<br />
A compiler translates human-readable source code (C, C++, Fortran) into executable binary programs. Choosing the right compiler and flags can significantly affect application performance on Magus02.<br />
<br />
__TOC__<br />
<br />
== General ==<br />
<br />
Compilers are loaded via the [[Magus02/Modules|module system]]. Never invoke compilers directly without loading the appropriate module first.<br />
<br />
A basic compilation workflow:<br />
<br />
<pre><br />
# 1. Load the compiler module<br />
$ module load intel/oneapi<br />
<br />
# 2. Compile your source code<br />
$ icc hello_world.c -o hello_world<br />
<br />
# 3. Run the resulting binary<br />
$ ./hello_world<br />
Hello, World!<br />
</pre><br />
<br />
=== Optimization Flags ===<br />
<br />
Always compile with optimization enabled for production runs. Common optimization levels:<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! Flag !! Effect<br />
|-<br />
| <code>-O0</code> || No optimization. Fastest compile; use when debugging.<br />
|-<br />
| <code>-O1</code> || Basic optimizations.<br />
|-<br />
| <code>-O2</code> || Recommended default for production β good balance of speed and compile time.<br />
|-<br />
| <code>-O3</code> || Aggressive optimization, including vectorization. May change floating-point behavior.<br />
|-<br />
| <code>-march=native</code> || Optimize specifically for the current CPU architecture (AMD EPYC / Intel Xeon on Magus02).<br />
|}<br />
<br />
== Intel Compiler (icc / ifort) ==<br />
<br />
The Intel compiler is optimized for Intel and compatible AMD microprocessors and often produces the fastest binaries for numerical codes.<br />
<br />
Load the module:<br />
<pre><br />
$ module load intel/oneapi<br />
</pre><br />
<br />
Compile C, C++, or Fortran:<br />
<pre><br />
$ icc source.c -O2 -o my_program # C<br />
$ icpc source.cpp -O2 -o my_program # C++<br />
$ ifort source.f90 -O2 -o my_program # Fortran 90<br />
</pre><br />
<br />
== GNU Compiler Collection (gcc / gfortran) ==<br />
<br />
GCC is a free, open-source compiler available on all platforms. Reliable and widely tested.<br />
<br />
Load the module:<br />
<pre><br />
$ module load gcc/11.2.0<br />
</pre><br />
<br />
Compile:<br />
<pre><br />
$ gcc source.c -O2 -o my_program # C<br />
$ g++ source.cpp -O2 -o my_program # C++<br />
$ gfortran source.f90 -O2 -o my_program # Fortran<br />
</pre><br />
<br />
== LLVM / Clang ==<br />
<br />
The LLVM project provides modern, modular compiler infrastructure. Useful for C/C++ and when targeting specific optimization analyses.<br />
<br />
<pre><br />
$ module load llvm<br />
$ clang source.c -O2 -o my_program # C<br />
$ clang++ source.cpp -O2 -o my_program # C++<br />
</pre><br />
<br />
== PGI / NVIDIA Compilers ==<br />
<br />
PGI compilers (now NVIDIA HPC SDK) are particularly useful for GPU programming with OpenACC pragmas.<br />
<br />
<pre><br />
$ module load nvhpc<br />
$ pgcc source.c -O2 -o my_program<br />
$ pgfort source.f90 -O2 -o my_program<br />
</pre><br />
<br />
== Compiling Multi-file Projects ==<br />
<br />
For programs split across multiple source files, use a linker or a build system:<br />
<br />
<pre><br />
# Compile with multiple source files:<br />
$ icc file1.c file2.c file3.c -O2 -o my_program<br />
<br />
# Or use make (for larger projects with a Makefile):<br />
$ module load intel/oneapi<br />
$ make<br />
</pre><br />
<br />
== References ==<br />
<br />
* [https://software.intel.com/en-us/intel-compilers Intel Compilers]<br />
* [https://gcc.gnu.org GNU Compiler Collection]<br />
* [https://llvm.org LLVM Compiler Infrastructure]<br />
* [[Magus02/MPI_Usage|MPI Usage β Compiler Wrappers]]<br />
* [[Magus02/OpenMP_Usage|OpenMP Usage β Compiler Flags]]<br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;"><br />
[[Magus02/Knowledge_Base|β Back to Knowledge Base]] Β· Maintained by HPC Administration Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/Scheduling_Basics&diff=1182
Magus02/Scheduling Basics
2026-04-20T06:39:08Z
<p>Deepak: new</p>
<hr />
<div>{{DISPLAYTITLE:Scheduling Basics β Magus02 HPC}}<br />
<div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-family:monospace;color:#5ba3d9;"><br />
π [[Magus02/Knowledge_Base|Magus02 Knowledge Base]] β Basics β Scheduling Basics<br />
</div><br />
<br />
This page explains the fundamental concepts behind batch scheduling on HPC clusters. For specific Slurm commands and job types, see [[Magus02/Batch_Scheduler|Batch Scheduler]].<br />
<br />
__TOC__<br />
<br />
== What is a Batch Scheduler? ==<br />
<br />
On Magus02, users do not run calculations directly and interactively on the compute nodes (as they would on a laptop). Instead, they submit '''batch jobs''' to the '''Slurm scheduler'''.<br />
<br />
The scheduler:<br />
* Stores submitted jobs in a queue<br />
* Evaluates each job's resource requirements and priority<br />
* Distributes jobs to suitable compute nodes when resources are available<br />
* Manages all 57+ compute nodes making up 98%+ of the cluster<br />
<br />
The '''login nodes''' are for compiling code, editing files, and submitting jobs. The '''compute nodes''' (accessed only through the scheduler) are where actual computation happens.<br />
<br />
<div style="background:#2a1a00;border-left:4px solid #f0c040;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#d4b870;"><br />
β οΈ <strong>Do not run compute jobs on login nodes.</strong> Heavy workloads on login nodes slow the system for all users and may result in your processes being killed. Always use Slurm for anything that takes more than a few seconds.<br />
</div><br />
<br />
== How a Batch Job Works ==<br />
<br />
# You write a '''jobscript''' β a shell script containing your commands and resource requests<br />
# You submit it with <code>sbatch jobscript.sh</code><br />
# Slurm adds it to a queue and waits for enough free resources<br />
# When resources become available, Slurm runs your job on compute nodes<br />
# Output is written to files you specified in the script<br />
<br />
You specify three key resources:<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! Resource !! Slurm Flag !! Description<br />
|-<br />
| Time || <code>--time=HH:MM:SS</code> || Maximum runtime. Job is killed if it exceeds this.<br />
|-<br />
| Cores || <code>--ntasks</code> or <code>--cpus-per-task</code> || Number of CPU cores needed.<br />
|-<br />
| Memory || <code>--mem=XG</code> or <code>--mem-per-cpu=XG</code> || RAM needed. Job may crash or not start if underspecified.<br />
|}<br />
<br />
== Scheduling Algorithms ==<br />
<br />
Modern schedulers like Slurm use a combination of strategies:<br />
<br />
=== First Come, First Served (FCFS) ===<br />
<br />
Jobs run in the order they were submitted. Simple and fair, but small jobs can wait behind large ones unnecessarily.<br />
<br />
=== Shortest Job First ===<br />
<br />
Jobs with shorter declared runtimes get priority. Very long-running jobs may be delayed significantly.<br />
<br />
=== Backfilling ===<br />
<br />
Slurm's default strategy. It maintains FCFS priority but allows shorter jobs to ''fill gaps'' in the schedule without delaying higher-priority jobs. This means short jobs typically see short wait times even when the cluster is busy.<br />
<br />
To benefit from backfilling, '''request an accurate runtime''' β not too long (wastes priority) and not too short (job gets killed before finishing).<br />
<br />
== Magus02 Queue Structure ==<br />
<br />
{| class="wikitable" style="width:100%;font-size:13px;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Queue<br />
! style="background:#0d1b2a;color:#94a8be;" | Processor<br />
! style="background:#0d1b2a;color:#94a8be;" | Min Cores<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Cores<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Nodes<br />
! style="background:#0d1b2a;color:#94a8be;" | Wall Time<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Cores/User<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Pending<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Running<br />
|-<br />
| <code>medium</code> || AMD EPYC 7763 || 32 || 128 || 77 || 1 week || 512 || 2 || 2<br />
|-<br />
| <code>small</code> || AMD EPYC 7043 || 8 || 32 || 16 || 1 month || 128 || 2 || 4<br />
|-<br />
| <code>high_mem</code> || AMD EPYC 7543 || 32 || 256 || 12 || 2 weeks || 1024 || 2 || 2<br />
|-<br />
| <code>large</code> || AMD EPYC 7763 || 64 || 256 || 24 || 2 weeks || 1024 || 2 || 2<br />
|-<br />
| <code>GPU</code> || Intel Xeon Platinum 8368 || 16 || 16 || 4 || 1 week || 32 || 2 || 2<br />
|-<br />
| <code>low/long</code> || AMD EPYC 7763 || 32 || 1024 || All || 1 month || 1024 || 2 || 8<br />
|}<br />
<br />
<div style="background:#0d1a0d;border-left:4px solid #39d353;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#80b880;"><br />
β
<strong>Queue selection guide:</strong><br />
* Testing / debugging β <strong>small</strong><br />
* Standard multi-node runs β <strong>medium</strong><br />
* Large production jobs β <strong>large</strong><br />
* Gaussian / large in-memory apps β <strong>high_mem</strong><br />
* GPU workloads (CUDA) β <strong>GPU</strong><br />
* Long, low-priority jobs β <strong>low/long</strong><br />
</div><br />
<br />
== References ==<br />
<br />
* [[Magus02/Batch_Scheduler|Batch Scheduler β Job Submission Guide]]<br />
* [[Magus02/FAQ_Batch_Jobs|FAQ: Batch Jobs]]<br />
* [[Magus02|Magus02 Main Page β Queue Details]]<br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;"><br />
[[Magus02/Knowledge_Base|β Back to Knowledge Base]] Β· Maintained by HPC Administration Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/File_Transfer&diff=1181
Magus02/File Transfer
2026-04-20T06:36:03Z
<p>Deepak: new</p>
<hr />
<div>{{DISPLAYTITLE:File Transfer β Magus02 HPC}}<br />
<div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-family:monospace;color:#5ba3d9;"><br />
π [[Magus02/Knowledge_Base|Magus02 Knowledge Base]] β Basics β File Transfer<br />
</div><br />
<br />
To run jobs on Magus02, your input data and scripts must reside on the cluster's filesystem. This page covers all methods for moving files between your local machine and Magus02.<br />
<br />
__TOC__<br />
<br />
== Choosing a Transfer Method ==<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! Method !! Best For !! Platform<br />
|-<br />
| <code>scp</code> || Quick transfer of one or a few files || Linux / macOS / Windows 10+<br />
|-<br />
| <code>rsync</code> || Syncing large directories efficiently || Linux / macOS<br />
|-<br />
| WinSCP || Graphical file manager for Windows || Windows<br />
|-<br />
| FileZilla || Cross-platform graphical FTP/SFTP client || Windows / macOS / Linux<br />
|}<br />
<br />
<div style="background:#0d1a2a;border-left:4px solid #00c9ff;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#94a8be;"><br />
π‘ <strong>Note:</strong> <code>scp</code> and <code>rsync</code> build on SSH. Ensure your SSH access is working first (see [[Magus02/SSH|SSH Access]]). If you load modules in your <code>.bashrc</code> that produce output, <code>scp</code> and <code>sftp</code> may fail β see the troubleshooting note below.<br />
</div><br />
<br />
== scp β Secure Copy ==<br />
<br />
<code>scp</code> is the simplest method for transferring individual files. It works wherever SSH works.<br />
<br />
<pre><br />
# Upload a local file to your home directory on Magus02:<br />
$ scp myinput.dat your_username@magus02.snu.edu.in:~/<br />
<br />
# Upload to a specific remote path:<br />
$ scp myinput.dat your_username@magus02.snu.edu.in:/scratch/myuser/project/<br />
<br />
# Download a file from Magus02 to your local machine:<br />
$ scp your_username@magus02.snu.edu.in:~/results/output.log ./<br />
<br />
# Upload an entire directory (recursive):<br />
$ scp -r myproject/ your_username@magus02.snu.edu.in:~/<br />
</pre><br />
<br />
=== Troubleshooting scp / sftp failures ===<br />
<br />
If <code>scp</code> fails silently or graphical clients like FileZilla show no files, the cause is often '''output generated during login''' (e.g. from <code>module load</code> commands in your <code>.bashrc</code>). Fix it by adding this guard to your <code>~/.bashrc</code>:<br />
<br />
<pre><br />
# Only run interactive-session commands when shell is interactive:<br />
[ -z "$PS1" ] && return<br />
# --- put all your 'module load ...' commands AFTER this line ---<br />
</pre><br />
<br />
== rsync β Directory Synchronisation ==<br />
<br />
<code>rsync</code> is more powerful than <code>scp</code>: it only transfers the '''differences''' between source and destination, making it far more efficient for large directories or repeated transfers.<br />
<br />
<pre><br />
# General syntax:<br />
$ rsync [options] [source] [destination]<br />
<br />
# Sync a local directory to Magus02 (compressed, verbose, human-readable):<br />
$ rsync -azvh -e ssh myproject/ your_username@magus02.snu.edu.in:/scratch/myuser/project/<br />
<br />
# Sync results back from Magus02 to your local machine:<br />
$ rsync -azvh -e ssh your_username@magus02.snu.edu.in:/scratch/myuser/project/results/ ./results/<br />
</pre><br />
<br />
Common options:<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! Option !! Effect<br />
|-<br />
| <code>-a</code> || Archive mode: preserves timestamps, permissions, symlinks, and recurses into subdirectories<br />
|-<br />
| <code>-z</code> || Compress data during transfer<br />
|-<br />
| <code>-v</code> || Verbose output β show files being transferred<br />
|-<br />
| <code>-h</code> || Human-readable sizes<br />
|-<br />
| <code>-n</code> || Dry run β show what would be transferred without actually doing it<br />
|-<br />
| <code>--delete</code> || Delete files at the destination that no longer exist at the source<br />
|}<br />
<br />
== WinSCP β Graphical Client (Windows) ==<br />
<br />
WinSCP provides a drag-and-drop file manager for Windows users.<br />
<br />
; Step 1 β Open WinSCP and configure the session:<br />
: Set '''File protocol''' to SFTP, '''Host name''' to <code>magus02.snu.edu.in</code>, '''Port''' to <code>22</code>, and enter your username and password. Click '''Login'''.<br />
<br />
; Step 2 β Accept the host key:<br />
: On first connection, click '''Yes''' to trust the host fingerprint.<br />
<br />
; Step 3 β Transfer files:<br />
: Your local files appear on the left panel, Magus02 files on the right. Drag and drop, or right-click to upload/download.<br />
<br />
Download WinSCP: [https://winscp.net winscp.net]<br />
<br />
== FileZilla β Cross-Platform Graphical Client ==<br />
<br />
FileZilla works on Windows, macOS, and Linux. Connect using SFTP:<br />
<br />
* '''Host:''' <code>sftp://magus02.snu.edu.in</code><br />
* '''Port:''' <code>22</code><br />
* Enter your username and password, then click '''Quickconnect'''.<br />
<br />
Your local files appear in the left panel; remote cluster files appear in the right panel.<br />
<br />
Download FileZilla: [https://filezilla-project.org filezilla-project.org]<br />
<br />
== References ==<br />
<br />
* [http://www.hypexr.org/linux_scp_help.php SCP usage examples]<br />
* [http://www.createdbypete.com/articles/a-practical-guide-to-using-rsync Basic rsync guide]<br />
* [[Magus02/SSH|SSH Access Guide]]<br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;"><br />
[[Magus02/Knowledge_Base|β Back to Knowledge Base]] Β· Maintained by HPC Administration Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/SSH&diff=1180
Magus02/SSH
2026-04-20T06:35:04Z
<p>Deepak: new</p>
<hr />
<div>===== FILE: 04_Magus02_SSH.txt =====<br />
PASTE INTO WIKI PAGE: Magus02/SSH<br />
<br />
{{DISPLAYTITLE:SSH Access β Magus02 HPC}}<br />
<div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-family:monospace;color:#5ba3d9;"><br />
π [[Magus02/Knowledge_Base|Magus02 Knowledge Base]] β Basics β SSH Access<br />
</div><br />
<br />
SSH (Secure Shell) is the standard protocol for accessing Magus02. It provides encrypted command-line access to the cluster's login nodes.<br />
<br />
__TOC__<br />
<br />
== General ==<br />
<br />
SSH allows you to log into a remote computer over a network and execute commands as if you were physically present. On Magus02, SSH connects you to the '''login nodes''' β dedicated front-end machines from which you can compile code, manage files, and submit jobs to Slurm.<br />
<br />
<div style="background:#2a1a00;border-left:4px solid #f0c040;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#d4b870;"><br />
β οΈ <strong>Important:</strong> Access to Magus02 login nodes is restricted to the SNU campus network. If you are off-campus, you must first connect to the SNU VPN before SSH will work. See the <strong>External Access</strong> section below.<br />
</div><br />
<br />
== SSH Clients by Platform ==<br />
<br />
=== Linux / macOS ===<br />
<br />
OpenSSH is pre-installed. Open a terminal and run:<br />
<br />
<pre><br />
$ ssh your_username@magus02.snu.edu.in<br />
</pre><br />
<br />
On first connection, you will be asked to verify the host fingerprint β type <code>yes</code> to accept. Enter your password when prompted.<br />
<br />
To enable X11 forwarding (for graphical applications):<br />
<br />
<pre><br />
$ ssh -X your_username@magus02.snu.edu.in<br />
# If -X doesn't work, try -Y (trusted forwarding):<br />
$ ssh -Y your_username@magus02.snu.edu.in<br />
</pre><br />
<br />
=== Windows ===<br />
<br />
Since Windows 10 version 1709, SSH is built in. Open '''Command Prompt''' or '''PowerShell''' and run:<br />
<br />
<pre><br />
ssh your_username@magus02.snu.edu.in<br />
</pre><br />
<br />
Alternatively, use a dedicated SSH client:<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! Client !! Notes !! Download<br />
|-<br />
| '''PuTTY''' || Classic, lightweight, widely documented || [https://putty.org putty.org]<br />
|-<br />
| '''MobaXterm''' || Integrated SSH + X11 + SFTP file browser || [https://mobaxterm.mobatek.net mobaxterm.mobatek.net]<br />
|-<br />
| '''Bitvise''' || Full-featured SSH + SFTP client || [https://bitvise.com bitvise.com]<br />
|-<br />
| '''Windows Subsystem for Linux (WSL)''' || Full Linux environment within Windows; use <code>ssh</code> natively || Built-in (enable via Windows Features)<br />
|}<br />
<br />
== SSH Key Authentication ==<br />
<br />
For convenience and improved security, use SSH key pairs instead of passwords. Generate a key pair on your local machine:<br />
<br />
<pre><br />
$ ssh-keygen -t ed25519 -C "your_email@snu.edu.in"<br />
# Accept the default location (~/.ssh/id_ed25519)<br />
# Set a strong passphrase<br />
<br />
# Copy your public key to Magus02:<br />
$ ssh-copy-id your_username@magus02.snu.edu.in<br />
</pre><br />
<br />
After this, SSH logins no longer require typing your password each time.<br />
<br />
== External Access β VPN ==<br />
<br />
<div style="background:#2a1e00;border:1px solid #5a4010;border-radius:10px;padding:20px 24px;margin:16px 0;"><br />
<div style="font-weight:700;font-size:15px;color:#f0c040;margin-bottom:8px;">π VPN Required for Off-Campus Access</div><br />
<div style="font-size:14px;color:#c8a850;line-height:1.7;">To access Magus02 from outside the SNU campus network, a VPN connection is mandatory. Without it, the SSH connection will time out. To obtain VPN credentials, submit a VPN Request Form to the HPC admin team or scan the QR code in your welcome email.</div><br />
</div><br />
<br />
Once VPN is active, SSH works exactly as normal:<br />
<br />
<pre><br />
# 1. Connect to SNU VPN using the provided client<br />
# 2. Then SSH as usual:<br />
$ ssh your_username@magus02.snu.edu.in<br />
</pre><br />
<br />
== Resetting Your Password ==<br />
<br />
; Step 1: Log in to Magus02 via SSH with your current password.<br />
; Step 2: Run the <code>passwd</code> command:<br />
<br />
<pre><br />
[user@magus02 ~]$ passwd<br />
Changing password for user user.<br />
Current password: β’β’β’β’β’β’β’β’<br />
New password: β’β’β’β’β’β’β’β’<br />
Retype new password: β’β’β’β’β’β’β’β’<br />
passwd: all authentication tokens updated successfully.<br />
</pre><br />
<br />
<div style="background:#0d1a2a;border-left:4px solid #00c9ff;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#94a8be;"><br />
π <strong>Password Policy:</strong> Minimum 8 characters; must include uppercase, lowercase, numbers, and special characters. Shared passwords are strictly prohibited.<br />
</div><br />
<br />
== References ==<br />
<br />
* [https://www.freebsd.org/cgi/man.cgi?query=ssh&sektion=1 SSH man page]<br />
* [[Magus02/Getting_Started|Getting Started on Magus02]]<br />
* [[Magus02/File_Transfer|File Transfer (SCP / WinSCP)]]<br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;"><br />
[[Magus02/Knowledge_Base|β Back to Knowledge Base]] Β· Maintained by HPC Administration Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/Getting_Started&diff=1177
Magus02/Getting Started
2026-04-20T06:25:54Z
<p>Deepak: new</p>
<hr />
<div>{{DISPLAYTITLE:Getting Started β Magus02 HPC}}<br />
<div style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 18px;margin-bottom:20px;font-size:13px;font-family:monospace;color:#5ba3d9;"><br />
π [[Magus02/Knowledge_Base|Magus02 Knowledge Base]] β Basics β Getting Started<br />
</div><br />
<br />
This guide walks you through the essential steps to start using the Magus02 HPC cluster β from getting access all the way to running your first batch job.<br />
<br />
__TOC__<br />
<br />
== Access β How to get a Magus02 account ==<br />
<br />
To use Magus02, you need an account provisioned by the HPC Administration Team. Depending on your role:<br />
<br />
* '''Students / Research Scholars:''' Request an account through your supervisor or PI. The PI submits an access request to the HPC admin team.<br />
* '''Faculty:''' Contact the HPC admin team directly at <code>hpc-admin@snu.edu.in</code>.<br />
* '''External collaborators:''' Require a formal request letter from a SNU faculty sponsor.<br />
<br />
Once your account is created, you will receive a welcome email with your username and initial password. You should [[Magus02|reset your password]] on first login.<br />
<br />
<div style="background:#2a1a00;border-left:4px solid #f0c040;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#d4b870;"><br />
β οΈ <strong>VPN Required for Off-Campus Access:</strong> Magus02 login nodes are only directly reachable from within the SNU campus network. If you are working remotely, you must first connect to the SNU VPN. Contact the HPC admin to obtain VPN credentials.<br />
</div><br />
<br />
== Login β How to connect to Magus02 ==<br />
<br />
Magus02 uses [[Magus02/SSH|SSH]] (Secure Shell) for all user logins. Connect to the login nodes β not the compute nodes directly.<br />
<br />
=== From Linux / macOS ===<br />
<br />
Open a terminal and run:<br />
<br />
<pre><br />
$ ssh your_username@magus02.snu.edu.in<br />
</pre><br />
<br />
On first login, you will be prompted to verify the host key fingerprint. Type <code>yes</code> to accept.<br />
<br />
=== From Windows ===<br />
<br />
Use one of the following free SSH clients:<br />
<br />
{| class="wikitable" style="width:100%;"<br />
|-<br />
! Client !! Description !! Download<br />
|-<br />
| '''PuTTY''' || Classic SSH client, widely used || [https://putty.org putty.org]<br />
|-<br />
| '''MobaXterm''' || SSH + X11 + file browser in one || [https://mobaxterm.mobatek.net mobaxterm.mobatek.net]<br />
|-<br />
| '''Windows Terminal / cmd''' || Built-in since Windows 10 1709 β just run <code>ssh</code> || Built-in<br />
|}<br />
<br />
Enter <code>magus02.snu.edu.in</code> as the hostname and port <code>22</code>.<br />
<br />
=== For graphical applications (X11) ===<br />
<br />
If you need to run GUI tools remotely, enable X11 forwarding:<br />
<br />
<pre><br />
$ ssh -X your_username@magus02.snu.edu.in<br />
</pre><br />
<br />
See the full [[Magus02/SSH|SSH guide]] for more details including key-based authentication.<br />
<br />
== File Transfer β Moving data onto / off the cluster ==<br />
<br />
You cannot run jobs from your local machine β files must be on the cluster's filesystem. Use one of these methods:<br />
<br />
* '''<code>scp</code>''' β for individual files (built into Linux/macOS/Windows 10+)<br />
* '''<code>rsync</code>''' β for syncing directories efficiently<br />
* '''WinSCP''' or '''FileZilla''' β graphical clients for Windows users<br />
<br />
Quick example with <code>scp</code>:<br />
<br />
<pre><br />
# Upload a file to your home directory on Magus02:<br />
$ scp myinput.dat your_username@magus02.snu.edu.in:~/<br />
<br />
# Download results back to your local machine:<br />
$ scp your_username@magus02.snu.edu.in:~/results/output.log ./<br />
</pre><br />
<br />
See the full [[Magus02/File_Transfer|File Transfer guide]] for rsync usage and graphical client setup.<br />
<br />
== Scheduler β How to run programs on the cluster ==<br />
<br />
On Magus02, you cannot run compute-intensive programs directly on the login nodes. All production work must be submitted as '''batch jobs''' to the [[Magus02/Scheduling_Basics|Slurm scheduler]], which manages the queue and allocates resources on compute nodes.<br />
<br />
The basic workflow is:<br />
<br />
# Write a '''jobscript''' β a shell script that specifies resource requirements and the commands to run<br />
# Submit it with <code>sbatch</code><br />
# Monitor with <code>squeue</code><br />
# Retrieve results from your output files<br />
<br />
A minimal Slurm jobscript looks like:<br />
<br />
<pre><br />
#!/bin/bash<br />
#SBATCH --job-name=my_first_job<br />
#SBATCH --partition=small<br />
#SBATCH --nodes=1<br />
#SBATCH --ntasks=8<br />
#SBATCH --mem=32G<br />
#SBATCH --time=01:00:00<br />
#SBATCH --output=job_%j.out<br />
#SBATCH --error=job_%j.err<br />
<br />
# Load required modules<br />
module purge<br />
module load intel/oneapi mpi/intelmpi<br />
<br />
# Run your program<br />
./my_program input.dat<br />
</pre><br />
<br />
Submit it with:<br />
<br />
<pre><br />
$ sbatch my_jobscript.sh<br />
Submitted batch job 12345<br />
</pre><br />
<br />
β See [[Magus02/Scheduling_Basics|Scheduling Basics]] and [[Magus02/Batch_Scheduler|Batch Scheduler]] for full details on queues, job types, and resource requests.<br />
<br />
== Modules β Using pre-installed software ==<br />
<br />
Magus02 uses the [[Magus02/Modules|Environment Modules]] system to manage software. Rather than installing everything yourself, you load the version you need:<br />
<br />
<pre><br />
$ module avail # list all available software<br />
$ module load intel/oneapi # load Intel compilers<br />
$ module list # check what is currently loaded<br />
$ module unload intel/oneapi # unload a module<br />
$ module purge # unload everything<br />
</pre><br />
<br />
β See [[Magus02/Modules|Environment Modules]] for full documentation.<br />
<br />
== Parallel Programming β Using multiple cores ==<br />
<br />
Most HPC workloads are designed to run in parallel across many CPU cores or nodes. Magus02 supports two primary paradigms:<br />
<br />
* '''[[Magus02/OpenMP_Usage|OpenMP]]''' β shared-memory parallelism within a single node (multithreading)<br />
* '''[[Magus02/MPI_Usage|MPI]]''' β distributed-memory parallelism across multiple nodes (message passing)<br />
<br />
Hybrid jobs using both OpenMP and MPI simultaneously are also supported.<br />
<br />
== Useful Starting Points ==<br />
<br />
* [[Magus02/Shell|Linux Shell Quick Reference]] β basic commands you'll use every day<br />
* [[Magus02/FAQ_Batch_Jobs|FAQ: Batch Jobs]] β troubleshooting common Slurm issues<br />
* [[Magus02|Magus02 Main Page]] β full cluster specs, queue structure, and applications<br />
<br />
<div style="background:#0d1a2a;border-left:4px solid #00c9ff;border-radius:6px;padding:14px 18px;margin:20px 0;font-size:14px;color:#94a8be;"><br />
π‘ <strong>Tip:</strong> Always use <code>module purge</code> at the start of your jobscripts to ensure a clean environment. Jobs that rely on modules loaded interactively can fail unpredictably. See [[Magus02/FAQ_Batch_Jobs|FAQ: Batch Jobs]] for more.<br />
</div><br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;"><br />
[[Magus02/Knowledge_Base|β Back to Knowledge Base]] Β· Maintained by HPC Administration Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02/Knowledge_Base&diff=1176
Magus02/Knowledge Base
2026-04-20T06:25:07Z
<p>Deepak: New Page</p>
<hr />
<div>{{DISPLAYTITLE:Magus02 β HPC Knowledge Base}}<br />
__NOTOC__<br />
<br />
<div style="background:linear-gradient(135deg,#0d1b2a 0%,#1a2a3f 100%);border:1px solid #2a4a6b;border-radius:10px;padding:30px 36px;margin-bottom:28px;"><br />
<div style="font-family:monospace;font-size:11px;color:#5ba3d9;letter-spacing:2px;text-transform:uppercase;margin-bottom:10px;">Shiv Nadar Institution of Eminence β HPC Infrastructure</div><br />
<div style="font-size:40px;font-weight:900;color:#ffffff;letter-spacing:-1px;line-height:1;margin-bottom:12px;">Magus02 HPC<br>Knowledge Base</div><br />
<div style="font-size:15px;color:#94a8be;max-width:680px;line-height:1.7;margin-bottom:24px;">Your complete reference for accessing, using, and getting the most out of the Magus02 High Performance Computing cluster at SNU. Whether you are a first-time user or an experienced HPC programmer, this wiki has you covered.</div><br />
<div style="display:flex;gap:12px;flex-wrap:wrap;"><br />
<span style="background:#00c9ff;color:#060e18;font-family:monospace;font-size:12px;font-weight:700;padding:6px 14px;border-radius:5px;">HOST: magus02.snu.edu.in</span><br />
<span style="background:rgba(57,211,83,0.15);color:#39d353;font-family:monospace;font-size:12px;font-weight:700;padding:6px 14px;border-radius:5px;border:1px solid rgba(57,211,83,0.3);">β SYSTEM OPERATIONAL</span><br />
<span style="background:rgba(0,201,255,0.1);color:#00c9ff;font-family:monospace;font-size:12px;padding:6px 14px;border-radius:5px;border:1px solid rgba(0,201,255,0.2);">SCHEDULER: Slurm</span><br />
</div><br />
</div><br />
<br />
== π Quick Navigation ==<br />
<br />
{| style="width:100%;border-collapse:separate;border-spacing:14px;"<br />
|-<br />
| colspan="2" style="background:#0a1520;border:2px solid #00c9ff;border-radius:10px;padding:20px 24px;" |<br />
<div style="font-size:13px;font-family:monospace;color:#5ba3d9;letter-spacing:1px;text-transform:uppercase;margin-bottom:8px;">β‘ New to Magus02? Start here</div><br />
<div style="font-size:16px;font-weight:700;color:#e6edf3;margin-bottom:6px;">[[Magus02/Getting_Started|β Getting Started Guide]]</div><br />
<div style="font-size:14px;color:#7a94aa;">Everything from account access and SSH login to running your first job β in one guide.</div><br />
|-<br />
| style="width:50%;background:#0d1b2a;border:1px solid #1e3a5a;border-radius:10px;padding:20px 22px;vertical-align:top;" |<br />
<div style="font-size:12px;font-family:monospace;color:#5ba3d9;letter-spacing:1px;text-transform:uppercase;margin-bottom:12px;">π Basics</div><br />
<div style="font-size:13px;line-height:2.2;color:#94a8be;"><br />
[[Magus02/Getting_Started|Getting Started]] Β· First steps on Magus02<br><br />
[[Magus02/Shell|Linux Shell]] Β· Commands and filesystem navigation<br><br />
[[Magus02/SSH|SSH Access]] Β· Connecting securely to the cluster<br><br />
[[Magus02/File_Transfer|File Transfer]] Β· scp, rsync, WinSCP, FileZilla<br><br />
[[Magus02/Modules|Environment Modules]] Β· Loading software on HPC<br><br />
[[Magus02/Scheduling_Basics|Scheduling Basics]] Β· How the batch system works<br />
</div><br />
| style="width:50%;background:#0d1b2a;border:1px solid #1e3a5a;border-radius:10px;padding:20px 22px;vertical-align:top;" |<br />
<div style="font-size:12px;font-family:monospace;color:#5ba3d9;letter-spacing:1px;text-transform:uppercase;margin-bottom:12px;">βοΈ HPC User Guide</div><br />
<div style="font-size:13px;line-height:2.2;color:#94a8be;"><br />
[[Magus02/Compiler|Compilers]] Β· GCC, Intel, LLVM, PGI<br><br />
[[Magus02/Batch_Scheduler|Batch Scheduler]] Β· Submitting and managing jobs<br><br />
[[Magus02/OpenMP_Usage|OpenMP Usage]] Β· Shared-memory parallelism<br><br />
[[Magus02/MPI_Usage|MPI Usage]] Β· Distributed-memory parallelism<br><br />
[[Magus02/NUMA|NUMA Architecture]] Β· Memory locality and pinning<br><br />
[[Magus02/FAQ_Batch_Jobs|FAQ: Batch Jobs]] Β· Common problems and solutions<br />
</div><br />
|}<br />
<br />
== π₯οΈ About Magus02 ==<br />
<br />
Magus02 is the primary HPC cluster at Shiv Nadar Institution of Eminence, Delhi NCR, hosted within the Department of Chemical Engineering. It provides researchers, faculty, and students with large-scale parallel computing resources for a wide range of workloads including computational chemistry, fluid dynamics, machine learning, and data analysis.<br />
<br />
=== Cluster at a Glance ===<br />
<br />
{| class="wikitable" style="width:100%;text-align:center;"<br />
|-<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | TOTAL CORES<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | PEAK PERFORMANCE<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | COMPUTE NODES<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | GPU NODES<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | TOTAL RAM<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | STORAGE<br />
|-<br />
| '''9,064''' || '''238 TFlops''' || '''57''' || '''2 (Tesla A100Γ4)''' || '''~42 TB''' || '''750 TB'''<br />
|}<br />
<br />
{| class="wikitable sortable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Node Type<br />
! style="background:#0d1b2a;color:#94a8be;" | Processor<br />
! style="background:#0d1b2a;color:#94a8be;" | RAM / Node<br />
! style="background:#0d1b2a;color:#94a8be;" | Cores / Node<br />
! style="background:#0d1b2a;color:#94a8be;" | GPU<br />
! style="background:#0d1b2a;color:#94a8be;" | Count<br />
! style="background:#0d1b2a;color:#94a8be;" | Total RAM<br />
! style="background:#0d1b2a;color:#94a8be;" | Total Cores<br />
|-<br />
| <span style="background:#0d2535;color:#00c9ff;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;">Compute Node</span><br />
| <code>AMD EPYC 7763</code> || 512 GB || 128 || β || 57 || 29,184 GB || 7,296<br />
|-<br />
| <span style="background:#2a2000;color:#f0c040;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;">High Memory Node</span><br />
| <code>AMD EPYC 7543</code> || 1,024 GB || 64 || β || 12 || 12,288 GB || 768<br />
|-<br />
| <span style="background:#0d2a10;color:#39d353;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;">GPU Node</span><br />
| <code>Intel Xeon Platinum 8368</code> || 512 GB || 64 || Tesla A100 Γ4 || 2 || 1,024 GB || 128<br />
|-<br />
| <span style="background:#2a1010;color:#f85149;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;">Storage</span><br />
| colspan="7" | <code>750 TB</code> Parallel Filesystem<br />
|}<br />
<br />
=== Queue Summary ===<br />
<br />
{| class="wikitable" style="width:100%;font-size:13px;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Queue<br />
! style="background:#0d1b2a;color:#94a8be;" | Node Type<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Cores/Job<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Nodes<br />
! style="background:#0d1b2a;color:#94a8be;" | Wall Time<br />
! style="background:#0d1b2a;color:#94a8be;" | Use Case<br />
|-<br />
| <span style="background:#0d2535;color:#00c9ff;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">medium</span> || Compute || 128 || 77 || 1 week || General multi-node jobs<br />
|-<br />
| <span style="background:#0d2a10;color:#39d353;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">small</span> || Compute || 32 || 16 || 1 month || Testing and small runs<br />
|-<br />
| <span style="background:#2a2000;color:#f0c040;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">high_mem</span> || High Memory || 256 || 12 || 2 weeks || Gaussian, large in-memory jobs<br />
|-<br />
| <span style="background:#2a1010;color:#f85149;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">large</span> || Compute || 256 || 24 || 2 weeks || Large parallel production runs<br />
|-<br />
| <span style="background:#1a0a30;color:#b392f0;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">GPU</span> || GPU || 16 || 4 || 1 week || CUDA/GPU workloads<br />
|-<br />
| <span style="background:#1a1a1a;color:#8b949e;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">low/long</span> || Compute || 1024 || All || 1 month || Long, low-priority jobs<br />
|}<br />
<br />
β See [[Magus02|Magus02 Cluster Page]] for full queue details, connection instructions, and application list.<br />
<br />
== π Documentation Sections ==<br />
<br />
=== Basics (New Users) ===<br />
<br />
{| style="width:100%;border-collapse:separate;border-spacing:10px;"<br />
|-<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π₯οΈ</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Getting_Started|Getting Started]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Access, login, VPN, first steps on the cluster.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">β¨οΈ</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Shell|Linux Shell]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Essential commands for navigation, files, and utilities.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/SSH|SSH Access]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Connecting from Linux, macOS, and Windows.</div><br />
|-<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/File_Transfer|File Transfer]]</div><br />
<div style="font-size:13px;color:#7a94aa;">scp, rsync, FTP/SFTP, WinSCP, FileZilla.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π¦</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Modules|Environment Modules]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Loading compilers, MPI, and scientific software.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Scheduling_Basics|Scheduling Basics]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Batch queues, job lifecycle, and scheduling algorithms.</div><br />
|}<br />
<br />
=== HPC User Guide ===<br />
<br />
{| style="width:100%;border-collapse:separate;border-spacing:10px;"<br />
|-<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π§</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Compiler|Compilers]]</div><br />
<div style="font-size:13px;color:#7a94aa;">GCC, Intel icc/ifort, LLVM/clang, PGI/NVIDIA.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π€</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Batch_Scheduler|Batch Scheduler]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Job types: serial, OpenMP, MPI, hybrid, array, chain.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/OpenMP_Usage|OpenMP Usage]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Compiling and running shared-memory parallel programs.</div><br />
|-<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/MPI_Usage|MPI Usage]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Open MPI and Intel MPI: compile, run, bind.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">ποΈ</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/NUMA|NUMA Architecture]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Non-uniform memory access, thread pinning, first-touch.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">β</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/FAQ_Batch_Jobs|FAQ: Batch Jobs]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Troubleshooting common Slurm job issues.</div><br />
|}<br />
<br />
== π Resources & Support ==<br />
<br />
{| style="width:100%;border-collapse:separate;border-spacing:12px;"<br />
|-<br />
| style="background:#0a1a0a;border:1px solid #1a4020;border-radius:8px;padding:16px 20px;vertical-align:top;width:50%;" |<br />
<div style="font-weight:700;font-size:14px;color:#39d353;margin-bottom:8px;">π Getting Help</div><br />
<div style="font-size:13px;color:#7a94aa;line-height:1.8;"><br />
Contact the HPC Administration Team for access requests, technical issues, and software installation.<br><br><br />
<strong style="color:#e6edf3;">Email:</strong> <code>hpc-admin@snu.edu.in</code><br><br />
<strong style="color:#e6edf3;">IT Helpdesk:</strong> Submit a ticket via the SNU IT portal<br />
</div><br />
| style="background:#0a1520;border:1px solid #1a3050;border-radius:8px;padding:16px 20px;vertical-align:top;width:50%;" |<br />
<div style="font-weight:700;font-size:14px;color:#00c9ff;margin-bottom:8px;">π Downloads</div><br />
<div style="font-size:13px;color:#7a94aa;line-height:1.8;"><br />
[[Media:Linux_Command_Reference.pdf|β¬ Slurm / Linux Command Reference (PDF)]]<br><br><br />
All major Slurm commands, job submission flags, and useful Linux utilities in a single printable reference sheet.<br />
</div><br />
|}<br />
<br />
<div style="background:#2a1a00;border-left:4px solid #f0c040;border-radius:6px;padding:14px 18px;margin:20px 0;font-size:14px;color:#d4b870;"><br />
β οΈ <strong>External Access Reminder:</strong> Accessing Magus02 from outside the SNU campus network requires a VPN connection. Contact the HPC admin team or scan the QR barcode on your welcome email to request VPN access. See [[Magus02/SSH#External_VPN|SSH β External VPN Access]] for details.<br />
</div><br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;margin-top:4px;"><br />
Maintained by HPC Administration Β· Shiv Nadar Institution of Eminence, Delhi NCR Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02_new&diff=1175
Magus02 new
2026-04-20T06:22:30Z
<p>Deepak: redesign</p>
<hr />
<div>{{DISPLAYTITLE:Magus02 β HPC Knowledge Base}}<br />
__NOTOC__<br />
<br />
<div style="background:linear-gradient(135deg,#0d1b2a 0%,#1a2a3f 100%);border:1px solid #2a4a6b;border-radius:10px;padding:30px 36px;margin-bottom:28px;"><br />
<div style="font-family:monospace;font-size:11px;color:#5ba3d9;letter-spacing:2px;text-transform:uppercase;margin-bottom:10px;">Shiv Nadar Institution of Eminence β HPC Infrastructure</div><br />
<div style="font-size:40px;font-weight:900;color:#ffffff;letter-spacing:-1px;line-height:1;margin-bottom:12px;">Magus02 HPC<br>Knowledge Base</div><br />
<div style="font-size:15px;color:#94a8be;max-width:680px;line-height:1.7;margin-bottom:24px;">Your complete reference for accessing, using, and getting the most out of the Magus02 High Performance Computing cluster at SNU. Whether you are a first-time user or an experienced HPC programmer, this wiki has you covered.</div><br />
<div style="display:flex;gap:12px;flex-wrap:wrap;"><br />
<span style="background:#00c9ff;color:#060e18;font-family:monospace;font-size:12px;font-weight:700;padding:6px 14px;border-radius:5px;">HOST: magus02.snu.edu.in</span><br />
<span style="background:rgba(57,211,83,0.15);color:#39d353;font-family:monospace;font-size:12px;font-weight:700;padding:6px 14px;border-radius:5px;border:1px solid rgba(57,211,83,0.3);">β SYSTEM OPERATIONAL</span><br />
<span style="background:rgba(0,201,255,0.1);color:#00c9ff;font-family:monospace;font-size:12px;padding:6px 14px;border-radius:5px;border:1px solid rgba(0,201,255,0.2);">SCHEDULER: Slurm</span><br />
</div><br />
</div><br />
<br />
== π Quick Navigation ==<br />
<br />
{| style="width:100%;border-collapse:separate;border-spacing:14px;"<br />
|-<br />
| colspan="2" style="background:#0a1520;border:2px solid #00c9ff;border-radius:10px;padding:20px 24px;" |<br />
<div style="font-size:13px;font-family:monospace;color:#5ba3d9;letter-spacing:1px;text-transform:uppercase;margin-bottom:8px;">β‘ New to Magus02? Start here</div><br />
<div style="font-size:16px;font-weight:700;color:#e6edf3;margin-bottom:6px;">[[Magus02/Getting_Started|β Getting Started Guide]]</div><br />
<div style="font-size:14px;color:#7a94aa;">Everything from account access and SSH login to running your first job β in one guide.</div><br />
|-<br />
| style="width:50%;background:#0d1b2a;border:1px solid #1e3a5a;border-radius:10px;padding:20px 22px;vertical-align:top;" |<br />
<div style="font-size:12px;font-family:monospace;color:#5ba3d9;letter-spacing:1px;text-transform:uppercase;margin-bottom:12px;">π Basics</div><br />
<div style="font-size:13px;line-height:2.2;color:#94a8be;"><br />
[[Magus02/Getting_Started|Getting Started]] Β· First steps on Magus02<br><br />
[[Magus02/Shell|Linux Shell]] Β· Commands and filesystem navigation<br><br />
[[Magus02/SSH|SSH Access]] Β· Connecting securely to the cluster<br><br />
[[Magus02/File_Transfer|File Transfer]] Β· scp, rsync, WinSCP, FileZilla<br><br />
[[Magus02/Modules|Environment Modules]] Β· Loading software on HPC<br><br />
[[Magus02/Scheduling_Basics|Scheduling Basics]] Β· How the batch system works<br />
</div><br />
| style="width:50%;background:#0d1b2a;border:1px solid #1e3a5a;border-radius:10px;padding:20px 22px;vertical-align:top;" |<br />
<div style="font-size:12px;font-family:monospace;color:#5ba3d9;letter-spacing:1px;text-transform:uppercase;margin-bottom:12px;">βοΈ HPC User Guide</div><br />
<div style="font-size:13px;line-height:2.2;color:#94a8be;"><br />
[[Magus02/Compiler|Compilers]] Β· GCC, Intel, LLVM, PGI<br><br />
[[Magus02/Batch_Scheduler|Batch Scheduler]] Β· Submitting and managing jobs<br><br />
[[Magus02/OpenMP_Usage|OpenMP Usage]] Β· Shared-memory parallelism<br><br />
[[Magus02/MPI_Usage|MPI Usage]] Β· Distributed-memory parallelism<br><br />
[[Magus02/NUMA|NUMA Architecture]] Β· Memory locality and pinning<br><br />
[[Magus02/FAQ_Batch_Jobs|FAQ: Batch Jobs]] Β· Common problems and solutions<br />
</div><br />
|}<br />
<br />
== π₯οΈ About Magus02 ==<br />
<br />
Magus02 is the primary HPC cluster at Shiv Nadar Institution of Eminence, Delhi NCR, hosted within the Department of Chemical Engineering. It provides researchers, faculty, and students with large-scale parallel computing resources for a wide range of workloads including computational chemistry, fluid dynamics, machine learning, and data analysis.<br />
<br />
=== Cluster at a Glance ===<br />
<br />
{| class="wikitable" style="width:100%;text-align:center;"<br />
|-<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | TOTAL CORES<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | PEAK PERFORMANCE<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | COMPUTE NODES<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | GPU NODES<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | TOTAL RAM<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | STORAGE<br />
|-<br />
| '''9,064''' || '''238 TFlops''' || '''57''' || '''2 (Tesla A100Γ4)''' || '''~42 TB''' || '''750 TB'''<br />
|}<br />
<br />
{| class="wikitable sortable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Node Type<br />
! style="background:#0d1b2a;color:#94a8be;" | Processor<br />
! style="background:#0d1b2a;color:#94a8be;" | RAM / Node<br />
! style="background:#0d1b2a;color:#94a8be;" | Cores / Node<br />
! style="background:#0d1b2a;color:#94a8be;" | GPU<br />
! style="background:#0d1b2a;color:#94a8be;" | Count<br />
! style="background:#0d1b2a;color:#94a8be;" | Total RAM<br />
! style="background:#0d1b2a;color:#94a8be;" | Total Cores<br />
|-<br />
| <span style="background:#0d2535;color:#00c9ff;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;">Compute Node</span><br />
| <code>AMD EPYC 7763</code> || 512 GB || 128 || β || 57 || 29,184 GB || 7,296<br />
|-<br />
| <span style="background:#2a2000;color:#f0c040;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;">High Memory Node</span><br />
| <code>AMD EPYC 7543</code> || 1,024 GB || 64 || β || 12 || 12,288 GB || 768<br />
|-<br />
| <span style="background:#0d2a10;color:#39d353;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;">GPU Node</span><br />
| <code>Intel Xeon Platinum 8368</code> || 512 GB || 64 || Tesla A100 Γ4 || 2 || 1,024 GB || 128<br />
|-<br />
| <span style="background:#2a1010;color:#f85149;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;">Storage</span><br />
| colspan="7" | <code>750 TB</code> Parallel Filesystem<br />
|}<br />
<br />
=== Queue Summary ===<br />
<br />
{| class="wikitable" style="width:100%;font-size:13px;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Queue<br />
! style="background:#0d1b2a;color:#94a8be;" | Node Type<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Cores/Job<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Nodes<br />
! style="background:#0d1b2a;color:#94a8be;" | Wall Time<br />
! style="background:#0d1b2a;color:#94a8be;" | Use Case<br />
|-<br />
| <span style="background:#0d2535;color:#00c9ff;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">medium</span> || Compute || 128 || 77 || 1 week || General multi-node jobs<br />
|-<br />
| <span style="background:#0d2a10;color:#39d353;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">small</span> || Compute || 32 || 16 || 1 month || Testing and small runs<br />
|-<br />
| <span style="background:#2a2000;color:#f0c040;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">high_mem</span> || High Memory || 256 || 12 || 2 weeks || Gaussian, large in-memory jobs<br />
|-<br />
| <span style="background:#2a1010;color:#f85149;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">large</span> || Compute || 256 || 24 || 2 weeks || Large parallel production runs<br />
|-<br />
| <span style="background:#1a0a30;color:#b392f0;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">GPU</span> || GPU || 16 || 4 || 1 week || CUDA/GPU workloads<br />
|-<br />
| <span style="background:#1a1a1a;color:#8b949e;font-family:monospace;font-size:11px;padding:2px 8px;border-radius:4px;">low/long</span> || Compute || 1024 || All || 1 month || Long, low-priority jobs<br />
|}<br />
<br />
β See [[Magus02|Magus02 Cluster Page]] for full queue details, connection instructions, and application list.<br />
<br />
== π Documentation Sections ==<br />
<br />
=== Basics (New Users) ===<br />
<br />
{| style="width:100%;border-collapse:separate;border-spacing:10px;"<br />
|-<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π₯οΈ</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Getting_Started|Getting Started]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Access, login, VPN, first steps on the cluster.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">β¨οΈ</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Shell|Linux Shell]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Essential commands for navigation, files, and utilities.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/SSH|SSH Access]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Connecting from Linux, macOS, and Windows.</div><br />
|-<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/File_Transfer|File Transfer]]</div><br />
<div style="font-size:13px;color:#7a94aa;">scp, rsync, FTP/SFTP, WinSCP, FileZilla.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π¦</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Modules|Environment Modules]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Loading compilers, MPI, and scientific software.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Scheduling_Basics|Scheduling Basics]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Batch queues, job lifecycle, and scheduling algorithms.</div><br />
|}<br />
<br />
=== HPC User Guide ===<br />
<br />
{| style="width:100%;border-collapse:separate;border-spacing:10px;"<br />
|-<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π§</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Compiler|Compilers]]</div><br />
<div style="font-size:13px;color:#7a94aa;">GCC, Intel icc/ifort, LLVM/clang, PGI/NVIDIA.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π€</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/Batch_Scheduler|Batch Scheduler]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Job types: serial, OpenMP, MPI, hybrid, array, chain.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;width:33%;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/OpenMP_Usage|OpenMP Usage]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Compiling and running shared-memory parallel programs.</div><br />
|-<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">π</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/MPI_Usage|MPI Usage]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Open MPI and Intel MPI: compile, run, bind.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">ποΈ</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/NUMA|NUMA Architecture]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Non-uniform memory access, thread pinning, first-touch.</div><br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:16px 18px;vertical-align:top;" |<br />
<div style="font-size:18px;margin-bottom:8px;">β</div><br />
<div style="font-weight:700;font-size:14px;margin-bottom:6px;color:#e6edf3;">[[Magus02/FAQ_Batch_Jobs|FAQ: Batch Jobs]]</div><br />
<div style="font-size:13px;color:#7a94aa;">Troubleshooting common Slurm job issues.</div><br />
|}<br />
<br />
== π Resources & Support ==<br />
<br />
{| style="width:100%;border-collapse:separate;border-spacing:12px;"<br />
|-<br />
| style="background:#0a1a0a;border:1px solid #1a4020;border-radius:8px;padding:16px 20px;vertical-align:top;width:50%;" |<br />
<div style="font-weight:700;font-size:14px;color:#39d353;margin-bottom:8px;">π Getting Help</div><br />
<div style="font-size:13px;color:#7a94aa;line-height:1.8;"><br />
Contact the HPC Administration Team for access requests, technical issues, and software installation.<br><br><br />
<strong style="color:#e6edf3;">Email:</strong> <code>hpc-admin@snu.edu.in</code><br><br />
<strong style="color:#e6edf3;">IT Helpdesk:</strong> Submit a ticket via the SNU IT portal<br />
</div><br />
| style="background:#0a1520;border:1px solid #1a3050;border-radius:8px;padding:16px 20px;vertical-align:top;width:50%;" |<br />
<div style="font-weight:700;font-size:14px;color:#00c9ff;margin-bottom:8px;">π Downloads</div><br />
<div style="font-size:13px;color:#7a94aa;line-height:1.8;"><br />
[[Media:Linux_Command_Reference.pdf|β¬ Slurm / Linux Command Reference (PDF)]]<br><br><br />
All major Slurm commands, job submission flags, and useful Linux utilities in a single printable reference sheet.<br />
</div><br />
|}<br />
<br />
<div style="background:#2a1a00;border-left:4px solid #f0c040;border-radius:6px;padding:14px 18px;margin:20px 0;font-size:14px;color:#d4b870;"><br />
β οΈ <strong>External Access Reminder:</strong> Accessing Magus02 from outside the SNU campus network requires a VPN connection. Contact the HPC admin team or scan the QR barcode on your welcome email to request VPN access. See [[Magus02/SSH#External_VPN|SSH β External VPN Access]] for details.<br />
</div><br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;margin-top:4px;"><br />
Maintained by HPC Administration Β· Shiv Nadar Institution of Eminence, Delhi NCR Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Magus02_new&diff=1174
Magus02 new
2026-04-20T05:43:08Z
<p>Deepak: New Page</p>
<hr />
<div>{{DISPLAYTITLE:Magus02 β HPC Cluster}}<br />
__TOC__<br />
<br />
<div style="background:linear-gradient(135deg,#0d1b2a 0%,#1a2a3f 100%);border:1px solid #2a4a6b;border-radius:10px;padding:28px 32px;margin-bottom:28px;"><br />
<div style="font-family:monospace;font-size:11px;color:#5ba3d9;letter-spacing:2px;text-transform:uppercase;margin-bottom:10px;">Shiv Nadar Institution of Eminence β HPC Infrastructure</div><br />
<div style="font-size:36px;font-weight:900;color:#ffffff;letter-spacing:-1px;margin-bottom:10px;">Magus02</div><br />
<div style="font-size:15px;color:#94a8be;max-width:620px;line-height:1.7;margin-bottom:20px;">The primary High Performance Computing cluster at SNU, providing researchers and students with parallel compute resources for scientific simulation, deep learning, computational chemistry, and data-intensive workflows.</div><br />
<br />
{| style="border-collapse:separate;border-spacing:16px 0;"<br />
|-<br />
| style="background:#162131;border:1px solid #2a4060;border-radius:8px;padding:14px 20px;text-align:center;" |<br />
<div style="font-size:26px;font-weight:900;color:#00c9ff;">9064</div><br />
<div style="font-size:10px;font-family:monospace;color:#5a7a9a;text-transform:uppercase;letter-spacing:1px;">Total Cores</div><br />
| style="background:#162131;border:1px solid #2a4060;border-radius:8px;padding:14px 20px;text-align:center;" |<br />
<div style="font-size:26px;font-weight:900;color:#00c9ff;">238 TFlops</div><br />
<div style="font-size:10px;font-family:monospace;color:#5a7a9a;text-transform:uppercase;letter-spacing:1px;">Peak Performance</div><br />
| style="background:#162131;border:1px solid #2a4060;border-radius:8px;padding:14px 20px;text-align:center;" |<br />
<div style="font-size:26px;font-weight:900;color:#00c9ff;">57</div><br />
<div style="font-size:10px;font-family:monospace;color:#5a7a9a;text-transform:uppercase;letter-spacing:1px;">Compute Nodes</div><br />
| style="background:#162131;border:1px solid #2a4060;border-radius:8px;padding:14px 20px;text-align:center;" |<br />
<div style="font-size:26px;font-weight:900;color:#00c9ff;">750 TB</div><br />
<div style="font-size:10px;font-family:monospace;color:#5a7a9a;text-transform:uppercase;letter-spacing:1px;">Storage</div><br />
|}<br />
</div><br />
<br />
== What is HPC? ==<br />
<br />
High Performance Computing (HPC) is the ability to process data and perform complex calculations at high speeds. To put it in perspective: a laptop or desktop with a 3 GHz processor can perform around 3 billion calculations per second. HPC solutions can perform '''quadrillions of calculations per second''' β far exceeding anything achievable on a standard workstation.<br />
<br />
HPC is specifically needed for the following reasons:<br />
<br />
* It paves the way for '''new innovations''' in science, technology, business, and academia.<br />
* It '''improves processing speeds''', which can be critical for computing operations, applications, and workloads.<br />
* It helps lay the foundation for a '''reliable, fast IT infrastructure''' that can store, process, and analyse massive amounts of data for various applications.<br />
<br />
=== Quick Specifications ===<br />
<br />
{| class="wikitable" style="width:100%;text-align:center;"<br />
|-<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | TOTAL CORES (AMD)<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | PEAK PERFORMANCE<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | COMPUTE NODES<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | LOGIN NODES<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | MASTER NODES<br />
! style="background:#0d1b2a;color:#00c9ff;font-family:monospace;font-size:11px;letter-spacing:1px;" | HIGH MEM NODES (SSD)<br />
|-<br />
| '''9064''' || '''238 TFlops''' || '''57''' || '''2''' || '''2''' || '''12'''<br />
|}<br />
<br />
<div style="background:#0d2a1a;border-left:4px solid #39d353;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#c0d8c8;"><br />
π‘ <strong>Memory per Core:</strong> Compute Nodes β <strong>4 GB/core</strong> (total ~29,184 GB) &nbsp;|&nbsp; High Memory Nodes β <strong>16 GB/core</strong> (total ~12,288 GB). Use the <code>high_mem</code> queue for memory-bound applications such as Gaussian.<br />
</div><br />
<br />
== Compute Specification ==<br />
<br />
{| class="wikitable sortable" style="width:100%;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | Node Type<br />
! style="background:#0d1b2a;color:#94a8be;" | Processor<br />
! style="background:#0d1b2a;color:#94a8be;" | RAM<br />
! style="background:#0d1b2a;color:#94a8be;" | Cores<br />
! style="background:#0d1b2a;color:#94a8be;" | GPU<br />
! style="background:#0d1b2a;color:#94a8be;" | No. of Nodes<br />
! style="background:#0d1b2a;color:#94a8be;" | Total RAM<br />
! style="background:#0d1b2a;color:#94a8be;" | Total Cores<br />
|-<br />
| <span style="background:#0d2535;color:#00c9ff;font-family:monospace;font-size:12px;padding:3px 9px;border-radius:4px;border:1px solid #1a4060;">Compute Node</span><br />
| <code>AMD EPYC 7763</code> || 512 GB || 128 || β || '''57''' || 29,184 GB || 7,296<br />
|-<br />
| <span style="background:#2a2000;color:#f0c040;font-family:monospace;font-size:12px;padding:3px 9px;border-radius:4px;border:1px solid #504000;">High Memory Node</span><br />
| <code>AMD EPYC 7543</code> || 1024 GB || 64 || β || '''12''' || 12,288 GB || 768<br />
|-<br />
| <span style="background:#0d2a10;color:#39d353;font-family:monospace;font-size:12px;padding:3px 9px;border-radius:4px;border:1px solid #1a5020;">GPU Node</span><br />
| <code>Intel Xeon Platinum 8368</code> || 512 GB || 64 || Tesla A100 Γ4 || '''2''' || 1,024 GB || 128<br />
|-<br />
| style="background:#1a1a1a;font-family:monospace;font-size:12px;color:#666;" | '''Totals'''<br />
| || || || || style="color:#00c9ff;font-weight:bold;" | 71 nodes || style="color:#00c9ff;font-weight:bold;" | ~42,496 GB || style="color:#00c9ff;font-weight:bold;" | 8,192<br />
|-<br />
| <span style="background:#2a1010;color:#f85149;font-family:monospace;font-size:12px;padding:3px 9px;border-radius:4px;border:1px solid #502020;">Storage</span><br />
| colspan="7" | <code>750 TB</code> β Parallel Filesystem<br />
|}<br />
<br />
<div style="background:#2a1a00;border-left:4px solid #f0c040;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#d4b870;"><br />
β οΈ <strong>High Memory Nodes</strong> are intended for applications that require large in-memory datasets but do not scale well across nodes (e.g., <em>Gaussian</em>). Submit to the <code>high_mem</code> queue and use <code>#SBATCH --mem</code> to request appropriate memory.<br />
</div><br />
<br />
== How to Connect to Magus02 ==<br />
<br />
Magus02 supports SSH-based access. Three connection methods are available:<br />
<br />
{| style="width:100%;border-collapse:separate;border-spacing:12px 0;"<br />
|-<br />
| style="width:33%;background:#0d1b2a;border:1px solid #1e3a5a;border-radius:10px;padding:20px;vertical-align:top;" |<br />
<div style="font-size:22px;margin-bottom:10px;">π</div><br />
<div style="font-weight:700;font-size:15px;margin-bottom:8px;color:#e6edf3;">Web Browser</div><br />
<div style="font-size:13px;color:#7a94aa;margin-bottom:12px;">Visit the login portal directly from any browser on the SNU network.</div><br />
<div style="background:#060e18;border:1px solid #1a3050;border-radius:5px;padding:8px 12px;font-family:monospace;font-size:12px;color:#79c0ff;">magus02.snu.edu.in</div><br />
| style="width:33%;background:#0d1b2a;border:1px solid #1e3a5a;border-radius:10px;padding:20px;vertical-align:top;" |<br />
<div style="font-size:22px;margin-bottom:10px;">π§</div><br />
<div style="font-weight:700;font-size:15px;margin-bottom:8px;color:#e6edf3;">Linux / macOS</div><br />
<div style="font-size:13px;color:#7a94aa;margin-bottom:12px;">Use the built-in SSH client from your terminal. Default port is 22.</div><br />
<div style="background:#060e18;border:1px solid #1a3050;border-radius:5px;padding:8px 12px;font-family:monospace;font-size:12px;color:#79c0ff;">ssh user@magus02.snu.edu.in</div><br />
| style="width:33%;background:#0d1b2a;border:1px solid #1e3a5a;border-radius:10px;padding:20px;vertical-align:top;" |<br />
<div style="font-size:22px;margin-bottom:10px;">πͺ</div><br />
<div style="font-weight:700;font-size:15px;margin-bottom:8px;color:#e6edf3;">Windows (PuTTY)</div><br />
<div style="font-size:13px;color:#7a94aa;margin-bottom:12px;">Download PuTTY and connect using the hostname and port below.</div><br />
<div style="background:#060e18;border:1px solid #1a3050;border-radius:5px;padding:8px 12px;font-family:monospace;font-size:12px;color:#79c0ff;">Host: magus02.snu.edu.in<br>Port: 22</div><br />
|}<br />
<br />
<pre style="background:#0d1117;border:1px solid #21293a;border-radius:8px;padding:18px;font-family:monospace;font-size:13px;color:#e6edf3;"><br />
# Connect from Linux / macOS terminal:<br />
$ ssh user@magus02.snu.edu.in # default port 22<br />
<br />
# Specify port explicitly:<br />
$ ssh -p 22 user@magus02.snu.edu.in<br />
</pre><br />
<br />
== How to Reset Password on Magus02 ==<br />
<br />
<div style="counter-reset:steps;"><br />
<br />
<div style="display:flex;gap:20px;padding:20px 0;border-bottom:1px solid #1e2d3d;"><br />
<div style="min-width:40px;height:40px;background:#0d1b2a;border:1px solid #2a4060;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:monospace;font-weight:700;color:#00c9ff;font-size:13px;flex-shrink:0;text-align:center;line-height:40px;">01</div><br />
<div><br />
<div style="font-weight:700;font-size:15px;margin-bottom:6px;margin-top:8px;">Log in to your Magus02 account</div><br />
<div style="font-size:14px;color:#7a94aa;">Connect via SSH using your existing credentials. If you cannot log in, contact the HPC administrator to reset your account.</div><br />
</div><br />
</div><br />
<br />
<div style="display:flex;gap:20px;padding:20px 0;"><br />
<div style="min-width:40px;height:40px;background:#0d1b2a;border:1px solid #2a4060;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:monospace;font-weight:700;color:#00c9ff;font-size:13px;flex-shrink:0;text-align:center;line-height:40px;">02</div><br />
<div><br />
<div style="font-weight:700;font-size:15px;margin-bottom:6px;margin-top:8px;">Run the <code>passwd</code> command</div><br />
<div style="font-size:14px;color:#7a94aa;">Once logged in, use the standard passwd utility. You will be prompted for your current password, then asked to enter and confirm the new one.</div><br />
<pre style="background:#0d1117;border:1px solid #21293a;border-radius:8px;padding:16px;font-family:monospace;font-size:13px;color:#e6edf3;margin-top:12px;"><br />
[user@magus02 ~]$ passwd<br />
Changing password for user user.<br />
Current password: β’β’β’β’β’β’β’β’<br />
New password: β’β’β’β’β’β’β’β’<br />
Retype new password: β’β’β’β’β’β’β’β’<br />
passwd: all authentication tokens updated successfully.<br />
</pre><br />
</div><br />
</div><br />
<br />
</div><br />
<br />
<div style="background:#0d1a2a;border-left:4px solid #00c9ff;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#94a8be;"><br />
π <strong>Password Policy:</strong> Minimum 8 characters including uppercase, lowercase, numbers, and special characters. Shared or weak passwords are strictly prohibited.<br />
</div><br />
<br />
== How to Connect to Magus from Outside SNU Network ==<br />
<br />
<div style="background:#2a1e00;border:1px solid #5a4010;border-radius:10px;padding:22px 26px;margin:16px 0;display:flex;gap:18px;align-items:flex-start;"><br />
<div style="font-size:30px;flex-shrink:0;">π</div><br />
<div><br />
<div style="font-weight:700;font-size:16px;color:#f0c040;margin-bottom:8px;">VPN Required for External Access</div><br />
<div style="font-size:14px;color:#c8a850;line-height:1.7;">To gain access to Magus02 from outside the SNU network, a <strong>VPN connection is mandatory</strong>. To acquire VPN access, submit a VPN Request Form or scan the QR barcode provided by the HPC administration team. Once connected, SSH works as normal.</div><br />
</div><br />
</div><br />
<br />
<pre style="background:#0d1117;border:1px solid #21293a;border-radius:8px;padding:18px;font-family:monospace;font-size:13px;color:#e6edf3;"><br />
# Step 1: Connect to SNU VPN using the provided VPN client<br />
# Step 2: Once VPN is active, SSH as usual:<br />
$ ssh user@magus02.snu.edu.in<br />
</pre><br />
<br />
== How to Transfer Data using WinSCP (Windows Client) ==<br />
<br />
WinSCP is a free Windows SFTP/SCP client that provides a graphical interface for transferring files between your Windows machine and the cluster.<br />
<br />
; Step 1 β Open WinSCP and fill in connection details, then click Login<br />
: Launch WinSCP. In the Login dialog enter:<br />
:* '''File protocol:''' SFTP<br />
:* '''Host name:''' <code>magus02.snu.edu.in</code><br />
:* '''Port number:''' <code>22</code><br />
:* '''User name:''' your username<br />
:* '''Password:''' your password<br />
: Click the '''Login''' button.<br />
<br />
; Step 2 β Click Yes on the Warning dialog<br />
: On first connection, WinSCP will display a host key warning. Click '''Yes''' to accept and proceed.<br />
<br />
; Step 3 β Transfer data using the Key Panel<br />
: Once connected, you will see a dual-panel view: local files on the left, remote cluster files on the right.<br />
:* '''To upload:''' Right-click a local file β Upload<br />
:* '''To download:''' Right-click a remote file β Download<br />
: Drag-and-drop is also supported between panels.<br />
<br />
<div style="background:#0d1a2a;border-left:4px solid #00c9ff;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#94a8be;"><br />
π‘ <strong>Linux / macOS alternative:</strong> Use <code>scp</code> or <code>rsync</code> from the terminal.<br><code>scp myfile.tar.gz user@magus02.snu.edu.in:~/</code><br />
</div><br />
<br />
== Applications on Magus ==<br />
<br />
The following scientific applications are pre-installed on Magus02. Use the module system to load the appropriate environment before submitting jobs.<br />
<br />
{| style="width:100%;border-collapse:separate;border-spacing:10px;"<br />
|-<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 16px;font-weight:600;" | π· VASP<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 16px;font-weight:600;" | π· Quantum ESPRESSO<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 16px;font-weight:600;" | π· Gaussian<br />
|-<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 16px;font-weight:600;" | π· Siesta<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 16px;font-weight:600;" | π· GROMACS<br />
| style="background:#0d1b2a;border:1px solid #1e3a5a;border-radius:8px;padding:12px 16px;font-weight:600;" | π· OpenFOAM<br />
|}<br />
<br />
<div style="background:#2a1a00;border-left:4px solid #f0c040;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#d4b870;"><br />
β οΈ <strong>Gaussian users:</strong> Gaussian requires high-memory nodes. Always submit Gaussian jobs to the <code>high_mem</code> queue and request sufficient memory with <code>#SBATCH --mem</code>.<br />
</div><br />
<br />
== Queue Structure on Magus02 ==<br />
<br />
Magus02 uses '''Slurm''' for job scheduling. Jobs are submitted to specific partitions based on required resources, node type, and runtime. Select the appropriate queue to minimise wait times.<br />
<br />
{| class="wikitable sortable" style="width:100%;font-size:13.5px;"<br />
|-<br />
! style="background:#0d1b2a;color:#94a8be;" | S.No.<br />
! style="background:#0d1b2a;color:#94a8be;" | Processor Architecture<br />
! style="background:#0d1b2a;color:#94a8be;" | Priority<br />
! style="background:#0d1b2a;color:#94a8be;" | Queue Name<br />
! style="background:#0d1b2a;color:#94a8be;" | Min Cores / Job<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Cores / Job<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Nodes<br />
! style="background:#0d1b2a;color:#94a8be;" | Wait Time<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Cores / User<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Pending Jobs<br />
! style="background:#0d1b2a;color:#94a8be;" | Max Running Jobs<br />
|-<br />
| 1 || AMD EPYC 7763 || 50 || <span style="background:#0d2535;color:#00c9ff;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;border:1px solid #1a4060;">medium</span> || 32 || 128 || 77 || 1 week || 512 || 2 || 2<br />
|-<br />
| 2 || AMD EPYC 7043 || 50 || <span style="background:#0d2a10;color:#39d353;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;border:1px solid #1a5020;">small</span> || 8 || 32 || 16 || 1 month || 128 || 2 || 4<br />
|-<br />
| 3 || AMD EPYC 7543 || 60 || <span style="background:#2a2000;color:#f0c040;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;border:1px solid #504000;">high_mem</span> || 32 || 256 || 12 || 2 weeks || 1024 || 2 || 2<br />
|-<br />
| 4 || AMD EPYC 7763 || 60 || <span style="background:#2a1010;color:#f85149;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;border:1px solid #502020;">large</span> || 64 || 256 || 24 || 2 weeks || 1024 || 2 || 2<br />
|-<br />
| 5 || Intel Xeon Platinum 8368 || β || <span style="background:#1a0a30;color:#b392f0;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;border:1px solid #3a2060;">GPU</span> || 16 || 16 || 4 || 1 week || 32 || 2 || 2<br />
|-<br />
| 6 || AMD EPYC 7763 || β || <span style="background:#1a1a1a;color:#8b949e;font-family:monospace;font-size:12px;padding:2px 8px;border-radius:4px;border:1px solid #333;">low / long</span> || 32 || 1024 || All nodes || 1 month || 1024 || 2 || 8<br />
|}<br />
<br />
<div style="background:#0d1a0d;border-left:4px solid #39d353;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#80b880;"><br />
β
<strong>Queue selection tip:</strong> For small test jobs or debugging β use <strong>small</strong>. For production multi-node runs β use <strong>medium</strong> or <strong>large</strong>. Memory-intensive applications (Gaussian, VASP single-node) β use <strong>high_mem</strong>. Long-running low-priority jobs β use <strong>low/long</strong>.<br />
</div><br />
<br />
== Slurm Command Reference ==<br />
<br />
=== Common Slurm Commands ===<br />
<br />
<pre style="background:#0d1117;border:1px solid #21293a;border-radius:8px;padding:18px;font-family:monospace;font-size:13px;color:#e6edf3;line-height:1.8;"><br />
# Submit a batch job<br />
$ sbatch job_script.sh<br />
<br />
# List all running/pending jobs<br />
$ squeue<br />
<br />
# Check only your jobs<br />
$ squeue -u $USER<br />
<br />
# Cancel a job by ID<br />
$ scancel JOB_ID<br />
<br />
# Check detailed job status<br />
$ scontrol show job JOB_ID<br />
<br />
# View partition / queue information<br />
$ sinfo<br />
<br />
# Start an interactive session<br />
$ srun --pty --partition=medium --ntasks=4 /bin/bash<br />
</pre><br />
<br />
=== Example Slurm Batch Script ===<br />
<br />
<pre style="background:#0d1117;border:1px solid #21293a;border-radius:8px;padding:18px;font-family:monospace;font-size:13px;color:#e6edf3;line-height:1.8;"><br />
#!/bin/bash<br />
#SBATCH --job-name=my_simulation<br />
#SBATCH --partition=medium<br />
#SBATCH --nodes=2<br />
#SBATCH --ntasks-per-node=64<br />
#SBATCH --mem=256G<br />
#SBATCH --time=7-00:00:00 # max 1 week<br />
#SBATCH --output=slurm-%j.out<br />
#SBATCH --error=slurm-%j.err<br />
<br />
module load intel/oneapi mpi/intelmpi<br />
<br />
mpirun -np $SLURM_NTASKS ./my_program<br />
</pre><br />
<br />
=== Slurm Reference PDF ===<br />
<br />
π [[Media:Linux_Command_Reference.pdf|Download Linux / Slurm Command Reference (PDF)]]<br />
<br />
<div style="background:#0d1a2a;border-left:4px solid #00c9ff;border-radius:6px;padding:14px 18px;margin:16px 0;font-size:14px;color:#94a8be;"><br />
For further assistance, contact the HPC Administration Team or raise a support ticket through the SNU IT helpdesk.<br />
</div><br />
<br />
----<br />
<div style="font-family:monospace;font-size:11px;color:#484f58;text-align:right;margin-top:8px;"><br />
Maintained by HPC Administration Β· Shiv Nadar Institution of Eminence, Delhi NCR Β· wiki.snu.edu.in<br />
</div></div>
Deepak
https://wiki.snu.edu.in/index.php?title=HPC_Backup&diff=1173
HPC Backup
2026-03-20T11:24:34Z
<p>Deepak: </p>
<hr />
<div>== HPC Cluster Upgrade: Data Backup Guide (March 2026) ==<br />
<br />
{| class="wikitable" style="width: 100%;"<br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Maintenance Window'''<br />
| Starting 27th March 2026<br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Backup Location'''<br />
| <code>/backup/&lt;username&gt;</code><br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Storage Limit'''<br />
| 10 GB per user<br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Recommended Data'''<br />
| Source code, scripts, configuration files, and small datasets.<br />
|}<br />
<br />
=== Overview ===<br />
During the extensive upgrade planned from '''27th March''', we aim to keep all data intact. However, as a safety measure against any untoward incidents, all users are requested to back up their critical work from <code>/data/home/&lt;username&gt;</code> to the temporary backup partition.<br />
<br />
=== Step 1: Verify Current Usage ===<br />
Check the size of your home directory to ensure you stay within the '''10 GB''' limit for the backup partition.<br />
<syntaxhighlight lang="bash"><br />
du -sh /data/home/$USER<br />
</syntaxhighlight><br />
<br />
=== Step 2: Compress Your Critical Files ===<br />
To save space and speed up the transfer, we recommend creating a compressed archive (tarball) of your code and scripts.<br />
<syntaxhighlight lang="bash"><br />
# Create a compressed backup of a specific project<br />
tar -czvf ~/my_code_backup_$(date +%F).tar.gz /data/home/$USER/my_project_folder<br />
</syntaxhighlight><br />
<br />
* <code data-path-to-node="10,0,0" data-index-in-node="0">-c</code>: Create a new archive.<br />
* <code data-path-to-node="10,1,0" data-index-in-node="0">-z</code>: Compress using gzip.<br />
* <code data-path-to-node="10,2,0" data-index-in-node="0">-v</code>: Verbosely list files processed (optional).<br />
* <code data-path-to-node="10,3,0" data-index-in-node="0">-f</code>: Use archive file.<br />
<br />
=== Step 3: Synchronize to Backup Directory ===<br />
Use <code>rsync</code> to copy your files to the dedicated backup path. This tool ensures file integrity during the transfer.<br />
<br />
==== Option A: Copying a Compressed Archive (Recommended) ====<br />
<syntaxhighlight lang="bash"><br />
rsync -ahP ~/my_code_backup_*.tar.gz /backup/$USER/<br />
</syntaxhighlight><br />
<br />
* <code data-path-to-node="18,0,0" data-index-in-node="0">-a</code>: Archive mode (preserves permissions and symbolic links).<br />
* <code data-path-to-node="18,1,0" data-index-in-node="0">-h</code>: Human-readable output.<br />
* <code data-path-to-node="18,2,0" data-index-in-node="0">-P</code>: Shows a progress bar during the transfer.<br />
<br />
==== Option B: Copying a Directory Directly ====<br />
<syntaxhighlight lang="bash"><br />
rsync -ahP /data/home/$USER/important_folder /backup/$USER/<br />
</syntaxhighlight><br />
<br />
=== Step 4: Verification ===<br />
Confirm your files are present and check the total space used in the backup directory:<br />
<syntaxhighlight lang="bash"><br />
ls -lh /backup/$USER/<br />
du -sh /backup/$USER/<br />
</syntaxhighlight><br />
<br />
=== Handling Large Data (>10 GB) ===<br />
If you have a genuine need to back up more than 10 GB:<br />
# '''Local Download:''' Download the data to your local machine using SCP or SFTP.<br />
# '''Contact IT/HPC Admic:''' If local download is not feasible, contact the IT team for alternative arrangements. Email: hpc.admin@snu.edu.in<br />
<br />
[[Category:HPC User Guides]]<br />
[[Category:Maintenance]]</div>
Deepak
https://wiki.snu.edu.in/index.php?title=HPC_Backup&diff=1172
HPC Backup
2026-03-20T11:17:12Z
<p>Deepak: email</p>
<hr />
<div>== HPC Cluster Upgrade: Data Backup Guide (March 2026) ==<br />
<br />
{| class="wikitable" style="width: 100%;"<br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Maintenance Window'''<br />
| Starting 27th March 2026<br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Backup Location'''<br />
| <code>/backup/&lt;username&gt;</code><br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Storage Limit'''<br />
| 10 GB per user<br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Recommended Data'''<br />
| Source code, scripts, configuration files, and small datasets.<br />
|}<br />
<br />
=== Overview ===<br />
During the extensive upgrade planned from '''27th March''', we aim to keep all data intact. However, as a safety measure against any untoward incidents, all users are requested to back up their critical work from <code>/data/home/&lt;username&gt;</code> to the temporary backup partition.<br />
<br />
=== Step 1: Verify Current Usage ===<br />
Check the size of your home directory to ensure you stay within the '''10 GB''' limit for the backup partition.<br />
<syntaxhighlight lang="bash"><br />
du -sh /data/home/$USER<br />
</syntaxhighlight><br />
<br />
=== Step 2: Compress Your Critical Files ===<br />
To save space and speed up the transfer, we recommend creating a compressed archive (tarball) of your code and scripts.<br />
<syntaxhighlight lang="bash"><br />
# Create a compressed backup of a specific project<br />
tar -czvf ~/my_code_backup_$(date +%F).tar.gz /data/home/$USER/my_project_folder<br />
</syntaxhighlight><br />
<br />
=== Step 3: Synchronize to Backup Directory ===<br />
Use <code>rsync</code> to copy your files to the dedicated backup path. This tool ensures file integrity during the transfer.<br />
<br />
==== Option A: Copying a Compressed Archive (Recommended) ====<br />
<syntaxhighlight lang="bash"><br />
rsync -ahP ~/my_code_backup_*.tar.gz /backup/$USER/<br />
</syntaxhighlight><br />
<br />
==== Option B: Copying a Directory Directly ====<br />
<syntaxhighlight lang="bash"><br />
rsync -ahP /data/home/$USER/important_folder /backup/$USER/<br />
</syntaxhighlight><br />
<br />
=== Step 4: Verification ===<br />
Confirm your files are present and check the total space used in the backup directory:<br />
<syntaxhighlight lang="bash"><br />
ls -lh /backup/$USER/<br />
du -sh /backup/$USER/<br />
</syntaxhighlight><br />
<br />
=== Handling Large Data (>10 GB) ===<br />
If you have a genuine need to back up more than 10 GB:<br />
# '''Local Download:''' Download the data to your local machine using SCP or SFTP.<br />
# '''Contact IT/HPC Admic:''' If local download is not feasible, contact the IT team for alternative arrangements. Email: hpc.admin@snu.edu.in<br />
<br />
[[Category:HPC User Guides]]<br />
[[Category:Maintenance]]</div>
Deepak
https://wiki.snu.edu.in/index.php?title=HPC_Backup&diff=1171
HPC Backup
2026-03-20T11:16:05Z
<p>Deepak: page</p>
<hr />
<div>== HPC Cluster Upgrade: Data Backup Guide (March 2026) ==<br />
<br />
{| class="wikitable" style="width: 100%;"<br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Maintenance Window'''<br />
| Starting 27th March 2026<br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Backup Location'''<br />
| <code>/backup/&lt;username&gt;</code><br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Storage Limit'''<br />
| 10 GB per user<br />
|-<br />
! scope="col" style="background:#f2f2f2;" | '''Recommended Data'''<br />
| Source code, scripts, configuration files, and small datasets.<br />
|}<br />
<br />
=== Overview ===<br />
During the extensive upgrade planned from '''27th March''', we aim to keep all data intact. However, as a safety measure against any untoward incidents, all users are requested to back up their critical work from <code>/data/home/&lt;username&gt;</code> to the temporary backup partition.<br />
<br />
=== Step 1: Verify Current Usage ===<br />
Check the size of your home directory to ensure you stay within the '''10 GB''' limit for the backup partition.<br />
<syntaxhighlight lang="bash"><br />
du -sh /data/home/$USER<br />
</syntaxhighlight><br />
<br />
=== Step 2: Compress Your Critical Files ===<br />
To save space and speed up the transfer, we recommend creating a compressed archive (tarball) of your code and scripts.<br />
<syntaxhighlight lang="bash"><br />
# Create a compressed backup of a specific project<br />
tar -czvf ~/my_code_backup_$(date +%F).tar.gz /data/home/$USER/my_project_folder<br />
</syntaxhighlight><br />
<br />
=== Step 3: Synchronize to Backup Directory ===<br />
Use <code>rsync</code> to copy your files to the dedicated backup path. This tool ensures file integrity during the transfer.<br />
<br />
==== Option A: Copying a Compressed Archive (Recommended) ====<br />
<syntaxhighlight lang="bash"><br />
rsync -ahP ~/my_code_backup_*.tar.gz /backup/$USER/<br />
</syntaxhighlight><br />
<br />
==== Option B: Copying a Directory Directly ====<br />
<syntaxhighlight lang="bash"><br />
rsync -ahP /data/home/$USER/important_folder /backup/$USER/<br />
</syntaxhighlight><br />
<br />
=== Step 4: Verification ===<br />
Confirm your files are present and check the total space used in the backup directory:<br />
<syntaxhighlight lang="bash"><br />
ls -lh /backup/$USER/<br />
du -sh /backup/$USER/<br />
</syntaxhighlight><br />
<br />
=== Handling Large Data (>10 GB) ===<br />
If you have a genuine need to back up more than 10 GB:<br />
# '''Local Download:''' Download the data to your local machine using SCP or SFTP.<br />
# '''Contact IT:''' If local download is not feasible, contact the IT team for alternative arrangements.<br />
<br />
[[Category:HPC User Guides]]<br />
[[Category:Maintenance]]</div>
Deepak
https://wiki.snu.edu.in/index.php?title=HPC_Backup&diff=1170
HPC Backup
2026-03-20T11:15:23Z
<p>Deepak: new page</p>
<hr />
<div>== HPC Cluster Upgrade: Data Backup Guide (March 2026) == {| class="wikitable" style="width: 100%;" |- ! scope="col" style="background:#f2f2f2;" | <nowiki>'''</nowiki>Maintenance Window<nowiki>'''</nowiki> | Starting 27th March 2026 |- ! scope="col" style="background:#f2f2f2;" | <nowiki>'''</nowiki>Backup Location<nowiki>'''</nowiki> | <nowiki><code>/backup/&</nowiki>lt;username<nowiki>&</nowiki>gt;<nowiki></code></nowiki> |- ! scope="col" style="background:#f2f2f2;" | <nowiki>'''</nowiki>Storage Limit<nowiki>'''</nowiki> | 10 GB per user |- ! scope="col" style="background:#f2f2f2;" | <nowiki>'''</nowiki>Recommended Data<nowiki>'''</nowiki> | Source code, scripts, configuration files, and small datasets. |} === Overview === During the extensive upgrade planned from <nowiki>'''</nowiki>27th March<nowiki>'''</nowiki>, we aim to keep all data intact. However, as a safety measure against any untoward incidents, all users are requested to back up their critical work from <nowiki><code>/data/home/&</nowiki>lt;username<nowiki>&</nowiki>gt;<nowiki></code></nowiki> to the temporary backup partition. === Step 1: Verify Current Usage === Check the size of your home directory to ensure you stay within the <nowiki>'''</nowiki>10 GB<nowiki>'''</nowiki> limit for the backup partition. <nowiki><syntaxhighlight lang="bash"> du -sh /data/home/$USER </syntaxhighlight></nowiki> === Step 2: Compress Your Critical Files === To save space and speed up the transfer, we recommend creating a compressed archive (tarball) of your code and scripts. <nowiki><syntaxhighlight lang="bash"> # Create a compressed backup of a specific project tar -czvf ~/my_code_backup_$(date +%F).tar.gz /data/home/$USER/my_project_folder </syntaxhighlight></nowiki> === Step 3: Synchronize to Backup Directory === Use <nowiki><code>rsync</code></nowiki> to copy your files to the dedicated backup path. This tool ensures file integrity during the transfer. ==== Option A: Copying a Compressed Archive (Recommended) ==== <nowiki><syntaxhighlight lang="bash"> rsync -ahP ~/my_code_backup_*.tar.gz /backup/$USER/ </syntaxhighlight></nowiki> ==== Option B: Copying a Directory Directly ==== <nowiki><syntaxhighlight lang="bash"> rsync -ahP /data/home/$USER/important_folder /backup/$USER/ </syntaxhighlight></nowiki> === Step 4: Verification === Confirm your files are present and check the total space used in the backup directory: <nowiki><syntaxhighlight lang="bash"> ls -lh /backup/$USER/ du -sh /backup/$USER/ </syntaxhighlight></nowiki> === Handling Large Data (>10 GB) === If you have a genuine need to back up more than 10 GB: # <nowiki>'''</nowiki>Local Download:<nowiki>'''</nowiki> Download the data to your local machine using SCP or SFTP. # <nowiki>'''</nowiki>Contact IT:<nowiki>'''</nowiki> If local download is not feasible, contact the IT team for alternative arrangements. <nowiki>[[Category:HPC User Guides]]</nowiki> <nowiki>[[Category:Maintenance]]</nowiki></div>
Deepak
https://wiki.snu.edu.in/index.php?title=HPC_Backup&diff=1169
HPC Backup
2026-03-20T11:14:10Z
<p>Deepak: new page</p>
<hr />
<div>== '''HPC Data Backup Technical Guide''' ==<br />
<br />
=== '''Step 1: Identify Your Critical Data''' ===<br />
Before starting, check your current usage to ensure you stay within the '''10 GB''' limit in the <code data-path-to-node="4" data-index-in-node="91">/backup</code> directory.<br />
<response-element class="" ng-version="0.0.0-PLACEHOLDER"><code-block _nghost-ng-c1964922315="" class="ng-tns-c1964922315-55 ng-star-inserted" style=""><div _ngcontent-ng-c1964922315="" class="code-block ng-tns-c1964922315-55 ng-animate-disabled ng-trigger ng-trigger-codeBlockRevealAnimation" jslog="223238;track:impression,attention;BardVeMetadataKey:[[&quot;r_272d4d52df4c55c4&quot;,&quot;c_370a422751401628&quot;,null,&quot;rc_94a40eca3057ca6d&quot;,null,null,&quot;en&quot;,null,1,null,null,1,0]]" data-hveid="0" decode-data-ved="1" data-ved="0CAAQhtANahgKEwj_yZXd7q2TAxUAAAAAHQAAAAAQkAE" style="display: block;"><div _ngcontent-ng-c1964922315="" class="code-block-decoration header-formatted gds-title-s ng-tns-c1964922315-55 ng-star-inserted" style=""><span _ngcontent-ng-c1964922315="" class="ng-tns-c1964922315-55">Bash</span><div _ngcontent-ng-c1964922315="" class="buttons ng-tns-c1964922315-55 ng-star-inserted"><button _ngcontent-ng-c1964922315="" aria-label="Copy code" mat-icon-button="" mattooltip="Copy code" class="mdc-icon-button mat-mdc-icon-button mat-mdc-button-base mat-mdc-tooltip-trigger copy-button ng-tns-c1964922315-55 mat-unthemed ng-star-inserted" mat-ripple-loader-uninitialized="" mat-ripple-loader-class-name="mat-mdc-button-ripple" mat-ripple-loader-centered="" jslog="179062;track:generic_click,impression;BardVeMetadataKey:[[&quot;r_272d4d52df4c55c4&quot;,&quot;c_370a422751401628&quot;,null,&quot;rc_94a40eca3057ca6d&quot;,null,null,&quot;en&quot;,null,1,null,null,1,0]];mutable:true"><span class="mat-mdc-button-persistent-ripple mdc-icon-button__ripple"></span><mat-icon _ngcontent-ng-c1964922315="" role="img" fonticon="content_copy" class="mat-icon notranslate gds-icon-s google-symbols mat-ligature-font mat-icon-no-color" aria-hidden="true" data-mat-icon-type="font" data-mat-icon-name="content_copy"></mat-icon><span class="mat-focus-indicator"></span><span class="mat-mdc-button-touch-target"></span></button></div></div><div _ngcontent-ng-c1964922315="" class="formatted-code-block-internal-container ng-tns-c1964922315-55"><div _ngcontent-ng-c1964922315="" class="animated-opacity ng-tns-c1964922315-55"><br />
<code _ngcontent-ng-c1964922315="" role="text" data-test-id="code-content" class="code-container formatted ng-tns-c1964922315-55">du -sh /data/home/<span class="hljs-variable">$USER</span><br />
</code><br />
</div></div></div></code-block></response-element><br />
<br />
=== '''Step 2: Compress Your Files (Recommended)''' ===<br />
Compressing your files into a single archive (tarball) makes the transfer faster and keeps the backup directory organized.<br />
<br />
'''To create a compressed archive of a specific project folder:'''<br />
<response-element class="" ng-version="0.0.0-PLACEHOLDER"><code-block _nghost-ng-c1964922315="" class="ng-tns-c1964922315-56 ng-star-inserted" style=""><div _ngcontent-ng-c1964922315="" class="code-block ng-tns-c1964922315-56 ng-animate-disabled ng-trigger ng-trigger-codeBlockRevealAnimation" jslog="223238;track:impression,attention;BardVeMetadataKey:[[&quot;r_272d4d52df4c55c4&quot;,&quot;c_370a422751401628&quot;,null,&quot;rc_94a40eca3057ca6d&quot;,null,null,&quot;en&quot;,null,1,null,null,1,0]]" data-hveid="0" decode-data-ved="1" data-ved="0CAAQhtANahgKEwj_yZXd7q2TAxUAAAAAHQAAAAAQkQE" style="display: block;"><div _ngcontent-ng-c1964922315="" class="code-block-decoration header-formatted gds-title-s ng-tns-c1964922315-56 ng-star-inserted" style=""><span _ngcontent-ng-c1964922315="" class="ng-tns-c1964922315-56">Bash</span><div _ngcontent-ng-c1964922315="" class="buttons ng-tns-c1964922315-56 ng-star-inserted"><button _ngcontent-ng-c1964922315="" aria-label="Copy code" mat-icon-button="" mattooltip="Copy code" class="mdc-icon-button mat-mdc-icon-button mat-mdc-button-base mat-mdc-tooltip-trigger copy-button ng-tns-c1964922315-56 mat-unthemed ng-star-inserted" mat-ripple-loader-uninitialized="" mat-ripple-loader-class-name="mat-mdc-button-ripple" mat-ripple-loader-centered="" jslog="179062;track:generic_click,impression;BardVeMetadataKey:[[&quot;r_272d4d52df4c55c4&quot;,&quot;c_370a422751401628&quot;,null,&quot;rc_94a40eca3057ca6d&quot;,null,null,&quot;en&quot;,null,1,null,null,1,0]];mutable:true"><span class="mat-mdc-button-persistent-ripple mdc-icon-button__ripple"></span><mat-icon _ngcontent-ng-c1964922315="" role="img" fonticon="content_copy" class="mat-icon notranslate gds-icon-s google-symbols mat-ligature-font mat-icon-no-color" aria-hidden="true" data-mat-icon-type="font" data-mat-icon-name="content_copy"></mat-icon><span class="mat-focus-indicator"></span><span class="mat-mdc-button-touch-target"></span></button></div></div><div _ngcontent-ng-c1964922315="" class="formatted-code-block-internal-container ng-tns-c1964922315-56"><div _ngcontent-ng-c1964922315="" class="animated-opacity ng-tns-c1964922315-56"><br />
<code _ngcontent-ng-c1964922315="" role="text" data-test-id="code-content" class="code-container formatted ng-tns-c1964922315-56">tar -czvf ~/my_backup_project.tar.gz /data/home/<span class="hljs-variable">$USER</span>/path_to_your_project<br />
</code><br />
</div></div></div></code-block></response-element><br />
<br />
* <code data-path-to-node="10,0,0" data-index-in-node="0">-c</code>: Create a new archive.<br />
* <code data-path-to-node="10,1,0" data-index-in-node="0">-z</code>: Compress using gzip.<br />
* <code data-path-to-node="10,2,0" data-index-in-node="0">-v</code>: Verbosely list files processed (optional).<br />
* <code data-path-to-node="10,3,0" data-index-in-node="0">-f</code>: Use archive file.<br />
<br />
----<br />
<br />
=== '''Step 3: Synchronize to the Backup Directory''' ===<br />
Use <code data-path-to-node="13" data-index-in-node="4">rsync</code> to move your compressed file or raw directories to the designated backup path. This tool is efficient as it verifies the integrity of the data during the copy.<br />
<br />
'''Option A: Copying a compressed tarball (Recommended)'''<br />
<response-element class="" ng-version="0.0.0-PLACEHOLDER"><code-block _nghost-ng-c1964922315="" class="ng-tns-c1964922315-57 ng-star-inserted" style=""><div _ngcontent-ng-c1964922315="" class="code-block ng-tns-c1964922315-57 ng-animate-disabled ng-trigger ng-trigger-codeBlockRevealAnimation" jslog="223238;track:impression,attention;BardVeMetadataKey:[[&quot;r_272d4d52df4c55c4&quot;,&quot;c_370a422751401628&quot;,null,&quot;rc_94a40eca3057ca6d&quot;,null,null,&quot;en&quot;,null,1,null,null,1,0]]" data-hveid="0" decode-data-ved="1" data-ved="0CAAQhtANahgKEwj_yZXd7q2TAxUAAAAAHQAAAAAQkgE" style="display: block;"><div _ngcontent-ng-c1964922315="" class="code-block-decoration header-formatted gds-title-s ng-tns-c1964922315-57 ng-star-inserted" style=""><span _ngcontent-ng-c1964922315="" class="ng-tns-c1964922315-57">Bash</span><div _ngcontent-ng-c1964922315="" class="buttons ng-tns-c1964922315-57 ng-star-inserted"><button _ngcontent-ng-c1964922315="" aria-label="Copy code" mat-icon-button="" mattooltip="Copy code" class="mdc-icon-button mat-mdc-icon-button mat-mdc-button-base mat-mdc-tooltip-trigger copy-button ng-tns-c1964922315-57 mat-unthemed ng-star-inserted" mat-ripple-loader-uninitialized="" mat-ripple-loader-class-name="mat-mdc-button-ripple" mat-ripple-loader-centered="" jslog="179062;track:generic_click,impression;BardVeMetadataKey:[[&quot;r_272d4d52df4c55c4&quot;,&quot;c_370a422751401628&quot;,null,&quot;rc_94a40eca3057ca6d&quot;,null,null,&quot;en&quot;,null,1,null,null,1,0]];mutable:true"><span class="mat-mdc-button-persistent-ripple mdc-icon-button__ripple"></span><mat-icon _ngcontent-ng-c1964922315="" role="img" fonticon="content_copy" class="mat-icon notranslate gds-icon-s google-symbols mat-ligature-font mat-icon-no-color" aria-hidden="true" data-mat-icon-type="font" data-mat-icon-name="content_copy"></mat-icon><span class="mat-focus-indicator"></span><span class="mat-mdc-button-touch-target"></span></button></div></div><div _ngcontent-ng-c1964922315="" class="formatted-code-block-internal-container ng-tns-c1964922315-57"><div _ngcontent-ng-c1964922315="" class="animated-opacity ng-tns-c1964922315-57"><br />
<code _ngcontent-ng-c1964922315="" role="text" data-test-id="code-content" class="code-container formatted ng-tns-c1964922315-57">rsync -ahP ~/my_backup_project.tar.gz /backup/<span class="hljs-variable">$USER</span>/<br />
</code><br />
</div></div></div></code-block></response-element><br />
'''Option B: Copying a directory directly (if under 10 GB)'''<br />
<br />
<response-element class="" ng-version="0.0.0-PLACEHOLDER"><code-block _nghost-ng-c1964922315="" class="ng-tns-c1964922315-58 ng-star-inserted" style=""><div _ngcontent-ng-c1964922315="" class="code-block ng-tns-c1964922315-58 ng-animate-disabled ng-trigger ng-trigger-codeBlockRevealAnimation" jslog="223238;track:impression,attention;BardVeMetadataKey:[[&quot;r_272d4d52df4c55c4&quot;,&quot;c_370a422751401628&quot;,null,&quot;rc_94a40eca3057ca6d&quot;,null,null,&quot;en&quot;,null,1,null,null,1,0]]" data-hveid="0" decode-data-ved="1" data-ved="0CAAQhtANahgKEwj_yZXd7q2TAxUAAAAAHQAAAAAQkwE" style="display: block;"><div _ngcontent-ng-c1964922315="" class="code-block-decoration header-formatted gds-title-s ng-tns-c1964922315-58 ng-star-inserted" style=""><span _ngcontent-ng-c1964922315="" class="ng-tns-c1964922315-58">Bash</span><div _ngcontent-ng-c1964922315="" class="buttons ng-tns-c1964922315-58 ng-star-inserted"><button _ngcontent-ng-c1964922315="" aria-label="Copy code" mat-icon-button="" mattooltip="Copy code" class="mdc-icon-button mat-mdc-icon-button mat-mdc-button-base mat-mdc-tooltip-trigger copy-button ng-tns-c1964922315-58 mat-unthemed ng-star-inserted" mat-ripple-loader-uninitialized="" mat-ripple-loader-class-name="mat-mdc-button-ripple" mat-ripple-loader-centered="" jslog="179062;track:generic_click,impression;BardVeMetadataKey:[[&quot;r_272d4d52df4c55c4&quot;,&quot;c_370a422751401628&quot;,null,&quot;rc_94a40eca3057ca6d&quot;,null,null,&quot;en&quot;,null,1,null,null,1,0]];mutable:true"><span class="mat-mdc-button-persistent-ripple mdc-icon-button__ripple"></span><mat-icon _ngcontent-ng-c1964922315="" role="img" fonticon="content_copy" class="mat-icon notranslate gds-icon-s google-symbols mat-ligature-font mat-icon-no-color" aria-hidden="true" data-mat-icon-type="font" data-mat-icon-name="content_copy"></mat-icon><span class="mat-focus-indicator"></span><span class="mat-mdc-button-touch-target"></span></button></div></div><div _ngcontent-ng-c1964922315="" class="formatted-code-block-internal-container ng-tns-c1964922315-58"><div _ngcontent-ng-c1964922315="" class="animated-opacity ng-tns-c1964922315-58"><br />
<code _ngcontent-ng-c1964922315="" role="text" data-test-id="code-content" class="code-container formatted ng-tns-c1964922315-58">rsync -ahP /data/home/<span class="hljs-variable">$USER</span>/my_folder /backup/<span class="hljs-variable">$USER</span>/<br />
</code><br />
</div></div></div></code-block></response-element><br />
<br />
* <code data-path-to-node="18,0,0" data-index-in-node="0">-a</code>: Archive mode (preserves permissions and symbolic links).<br />
* <code data-path-to-node="18,1,0" data-index-in-node="0">-h</code>: Human-readable output.<br />
* <code data-path-to-node="18,2,0" data-index-in-node="0">-P</code>: Shows a progress bar during the transfer.<br />
<br />
----<br />
<br />
=== '''Step 4: Verify the Backup''' ===<br />
Once the transfer is complete, confirm your files are present and check the final size:<br />
<response-element class="" ng-version="0.0.0-PLACEHOLDER"><code-block _nghost-ng-c1964922315="" class="ng-tns-c1964922315-59 ng-star-inserted" style=""><div _ngcontent-ng-c1964922315="" class="code-block ng-tns-c1964922315-59 ng-animate-disabled ng-trigger ng-trigger-codeBlockRevealAnimation" jslog="223238;track:impression,attention;BardVeMetadataKey:[[&quot;r_272d4d52df4c55c4&quot;,&quot;c_370a422751401628&quot;,null,&quot;rc_94a40eca3057ca6d&quot;,null,null,&quot;en&quot;,null,1,null,null,1,0]]" data-hveid="0" decode-data-ved="1" data-ved="0CAAQhtANahgKEwj_yZXd7q2TAxUAAAAAHQAAAAAQlAE" style="display: block;"><div _ngcontent-ng-c1964922315="" class="code-block-decoration header-formatted gds-title-s ng-tns-c1964922315-59 ng-star-inserted" style=""><span _ngcontent-ng-c1964922315="" class="ng-tns-c1964922315-59">Bash</span><div _ngcontent-ng-c1964922315="" class="buttons ng-tns-c1964922315-59 ng-star-inserted"><button _ngcontent-ng-c1964922315="" aria-label="Copy code" mat-icon-button="" mattooltip="Copy code" class="mdc-icon-button mat-mdc-icon-button mat-mdc-button-base mat-mdc-tooltip-trigger copy-button ng-tns-c1964922315-59 mat-unthemed ng-star-inserted" mat-ripple-loader-uninitialized="" mat-ripple-loader-class-name="mat-mdc-button-ripple" mat-ripple-loader-centered="" jslog="179062;track:generic_click,impression;BardVeMetadataKey:[[&quot;r_272d4d52df4c55c4&quot;,&quot;c_370a422751401628&quot;,null,&quot;rc_94a40eca3057ca6d&quot;,null,null,&quot;en&quot;,null,1,null,null,1,0]];mutable:true"><span class="mat-mdc-button-persistent-ripple mdc-icon-button__ripple"></span><mat-icon _ngcontent-ng-c1964922315="" role="img" fonticon="content_copy" class="mat-icon notranslate gds-icon-s google-symbols mat-ligature-font mat-icon-no-color" aria-hidden="true" data-mat-icon-type="font" data-mat-icon-name="content_copy"></mat-icon><span class="mat-focus-indicator"></span><span class="mat-mdc-button-touch-target"></span></button></div></div><div _ngcontent-ng-c1964922315="" class="formatted-code-block-internal-container ng-tns-c1964922315-59"><div _ngcontent-ng-c1964922315="" class="animated-opacity ng-tns-c1964922315-59"><br />
<code _ngcontent-ng-c1964922315="" role="text" data-test-id="code-content" class="code-container formatted ng-tns-c1964922315-59">ls -lh /backup/<span class="hljs-variable">$USER</span>/<br />
du -sh /backup/<span class="hljs-variable">$USER</span></code><br />
</div></div></div></code-block></response-element></div>
Deepak
https://wiki.snu.edu.in/index.php?title=Main_Page&diff=1168
Main Page
2026-03-20T05:17:07Z
<p>Deepak: hpc</p>
<hr />
<div>{| class="greyscale" style="width: 100%;" width="1334" data-mce-style="height: 26px ;background-color:#005197;"<br />
| style="background-color:;font-family:Verdana, Arial, Helvetica, sans-serif;font-size:11px;border:1px dashed rgb(187, 187, 187);" class="col-white-bg" |<br />
=== <span class="col-turquoise">Information Technology Resource Centre :</span> === <br />
'''<big>Configuration of Wi-Fi</big>''' [[File:down13.jpg|frameless|25x25px]]<br />
* [[Configuration of Wifi for Students|<big>Configuration of Wifi for Students</big>]]<br />
*[[Configuration of Wifi System for Guest|<big>Configuration of Wifi System for Guest</big>]]<br />
*[[How to Approve Guest Wifi Request|<big>How to Approve Guest Wifi Request</big>]]<br />
*[[How to connect Eduroam WIfi|<big>How to connect Eduroam WIfi</big>]] <br /><br />
<br />
<br />
<br />
'''<big>Net ID Setup</big>''' [[File:download (5).png|frameless|21x21px]]<br />
<br />
*[[Setting up your NetID Password|<big>Setting up your NetID Password</big>]] : <span lang="en" dir="ltr"><big>(First Time Setup, Forget Password, Change Password)</big></span><small><br /></small><br />
<br />
<br />
'''<big>Email ID Setup</big>''' [[File:download (8).1716959100424.jpg|frameless|25x25px]] <br />
<br />
* <big>[[Setting up your University Email ID Password.]]</big><br />
<br />
<br />
'''<big>Microsoft Teams Setup</big>''' [[File:RE1Mu3b.1747285649387.png|link=https://wiki.snu.edu.in/File:RE1Mu3b.1747285649387.png|frameless|101x101px]]<br />
<br />
* <big>[[Microsoft Teams Installation and Guide]]</big><br />
* <big>[[Manage attendee audio permissions]]</big><br />
* <big>[[Schedule Microsoft Teams meeting from Microsoft Outlook]]</big><br />
* <big>[[How to Join Microsoft Teams meeting from web client]]</big><br />
* <big>[[Create a Class in MS Teams]]</big><br />
* <big>[[Change Meeting Permissions for Attendees through MS Teams]]</big><br />
<br />
<br />
<br />
'''<big>Configuration of VPN</big>''' [[File:download (6).1716183181171.png|frameless|27x27px]]<br />
*[[How to connect VPN-IVANTI (Students)|<big>How to connect VPN-IVANTI (Students)</big>]]<br />
*[[How to connect VPN-IVANTI (Staff)|<big>How to connect VPN-IVANTI (Staff)</big>]]<br />
<br />
'''<big>High Performance Computing cluster (Magus)</big>''' [[File:images (2).png|frameless|42x42px]]<br />
*<big>[[HPC|old HPC Magus01]]</big><br />
<br />
*<big>[[Magus02|HPC Cluster Magus02]]</big><br />
*<big>[[Open FOAM]]</big><br />
*<big>[[Nanoelectronics Computation Laboratory - NCL]]</big><br /><br />
<br />
<br />
'''<big>Academia Installation</big>''' [[File:images.png|frameless|21x21px]]<br />
<br />
*<big>[[Academia NativeApps Client Installation]]</big><br /><br />
<br />
<br />
<br />
<big>'''DIGII Campus Application'''</big> [[File:download5678.png|frameless|38x38px]]<br />
*<big>[[How to create Request (For Night and Day Out Pass)]]</big><br />
*<big>[[How to download the Digii Campus Application]]</big><br />
*<big>[[How to login Collpoll Application- Parent's|How to login DigiiCampus Application- Parent's]]</big><br />
*<big>[[How to login in Digii (Formely Coll Poll)|How to login in DigiiCampus Application]] - '''For Students'''</big><br />
*[[Parental Approval Process|<big>Parental Approval Process</big>]] - <big>'''For Parent's'''</big><br /><br />
<br />
<br />
<big>'''Obtaining a Free Windows 11 Education License for Students'''</big> [[File:win11.1753764385890.jpg|frameless|38x38px]]<br />
*<big>[[Active students at University are eligible to obtain a free Windows 11 Education license]]</big><br />
<br />
<br />
====='''<big>[[Get Informed: Frequently Asked Questions"]]</big>'''=====<br />
|-<br />
|<br />
|}</div>
Deepak
https://wiki.snu.edu.in/index.php?title=Main_Page&diff=1167
Main Page
2026-03-20T05:16:29Z
<p>Deepak: hpc</p>
<hr />
<div>{| class="greyscale" style="width: 100%;" width="1334" data-mce-style="height: 26px ;background-color:#005197;"<br />
| style="background-color:;font-family:Verdana, Arial, Helvetica, sans-serif;font-size:11px;border:1px dashed rgb(187, 187, 187);" class="col-white-bg" |<br />
=== <span class="col-turquoise">Information Technology Resource Centre :</span> === <br />
'''<big>Configuration of Wi-Fi</big>''' [[File:down13.jpg|frameless|25x25px]]<br />
* [[Configuration of Wifi for Students|<big>Configuration of Wifi for Students</big>]]<br />
*[[Configuration of Wifi System for Guest|<big>Configuration of Wifi System for Guest</big>]]<br />
*[[How to Approve Guest Wifi Request|<big>How to Approve Guest Wifi Request</big>]]<br />
*[[How to connect Eduroam WIfi|<big>How to connect Eduroam WIfi</big>]] <br /><br />
<br />
<br />
<br />
'''<big>Net ID Setup</big>''' [[File:download (5).png|frameless|21x21px]]<br />
<br />
*[[Setting up your NetID Password|<big>Setting up your NetID Password</big>]] : <span lang="en" dir="ltr"><big>(First Time Setup, Forget Password, Change Password)</big></span><small><br /></small><br />
<br />
<br />
'''<big>Email ID Setup</big>''' [[File:download (8).1716959100424.jpg|frameless|25x25px]] <br />
<br />
* <big>[[Setting up your University Email ID Password.]]</big><br />
<br />
<br />
'''<big>Microsoft Teams Setup</big>''' [[File:RE1Mu3b.1747285649387.png|link=https://wiki.snu.edu.in/File:RE1Mu3b.1747285649387.png|frameless|101x101px]]<br />
<br />
* <big>[[Microsoft Teams Installation and Guide]]</big><br />
* <big>[[Manage attendee audio permissions]]</big><br />
* <big>[[Schedule Microsoft Teams meeting from Microsoft Outlook]]</big><br />
* <big>[[How to Join Microsoft Teams meeting from web client]]</big><br />
* <big>[[Create a Class in MS Teams]]</big><br />
* <big>[[Change Meeting Permissions for Attendees through MS Teams]]</big><br />
<br />
<br />
<br />
'''<big>Configuration of VPN</big>''' [[File:download (6).1716183181171.png|frameless|27x27px]]<br />
*[[How to connect VPN-IVANTI (Students)|<big>How to connect VPN-IVANTI (Students)</big>]]<br />
*[[How to connect VPN-IVANTI (Staff)|<big>How to connect VPN-IVANTI (Staff)</big>]]<br />
<br />
'''<big>High Performance Computing cluster (Magus)</big>''' [[File:images (2).png|frameless|42x42px]]<br />
*<big>[[HPC|old HPC Magus01]]</big><br />
<br />
*<big>[[HPC Cluster Magus02]]</big><br />
*<big>[[Open FOAM]]</big><br />
*<big>[[Nanoelectronics Computation Laboratory - NCL]]</big><br /><br />
<br />
<br />
'''<big>Academia Installation</big>''' [[File:images.png|frameless|21x21px]]<br />
<br />
*<big>[[Academia NativeApps Client Installation]]</big><br /><br />
<br />
<br />
<br />
<big>'''DIGII Campus Application'''</big> [[File:download5678.png|frameless|38x38px]]<br />
*<big>[[How to create Request (For Night and Day Out Pass)]]</big><br />
*<big>[[How to download the Digii Campus Application]]</big><br />
*<big>[[How to login Collpoll Application- Parent's|How to login DigiiCampus Application- Parent's]]</big><br />
*<big>[[How to login in Digii (Formely Coll Poll)|How to login in DigiiCampus Application]] - '''For Students'''</big><br />
*[[Parental Approval Process|<big>Parental Approval Process</big>]] - <big>'''For Parent's'''</big><br /><br />
<br />
<br />
<big>'''Obtaining a Free Windows 11 Education License for Students'''</big> [[File:win11.1753764385890.jpg|frameless|38x38px]]<br />
*<big>[[Active students at University are eligible to obtain a free Windows 11 Education license]]</big><br />
<br />
<br />
====='''<big>[[Get Informed: Frequently Asked Questions"]]</big>'''=====<br />
|-<br />
|<br />
|}</div>
Deepak
https://wiki.snu.edu.in/index.php?title=Main_Page&diff=1166
Main Page
2026-03-20T05:15:40Z
<p>Deepak: hpc</p>
<hr />
<div>{| class="greyscale" style="width: 100%;" width="1334" data-mce-style="height: 26px ;background-color:#005197;"<br />
| style="background-color:;font-family:Verdana, Arial, Helvetica, sans-serif;font-size:11px;border:1px dashed rgb(187, 187, 187);" class="col-white-bg" |<br />
=== <span class="col-turquoise">Information Technology Resource Centre :</span> === <br />
'''<big>Configuration of Wi-Fi</big>''' [[File:down13.jpg|frameless|25x25px]]<br />
* [[Configuration of Wifi for Students|<big>Configuration of Wifi for Students</big>]]<br />
*[[Configuration of Wifi System for Guest|<big>Configuration of Wifi System for Guest</big>]]<br />
*[[How to Approve Guest Wifi Request|<big>How to Approve Guest Wifi Request</big>]]<br />
*[[How to connect Eduroam WIfi|<big>How to connect Eduroam WIfi</big>]] <br /><br />
<br />
<br />
<br />
'''<big>Net ID Setup</big>''' [[File:download (5).png|frameless|21x21px]]<br />
<br />
*[[Setting up your NetID Password|<big>Setting up your NetID Password</big>]] : <span lang="en" dir="ltr"><big>(First Time Setup, Forget Password, Change Password)</big></span><small><br /></small><br />
<br />
<br />
'''<big>Email ID Setup</big>''' [[File:download (8).1716959100424.jpg|frameless|25x25px]] <br />
<br />
* <big>[[Setting up your University Email ID Password.]]</big><br />
<br />
<br />
'''<big>Microsoft Teams Setup</big>''' [[File:RE1Mu3b.1747285649387.png|link=https://wiki.snu.edu.in/File:RE1Mu3b.1747285649387.png|frameless|101x101px]]<br />
<br />
* <big>[[Microsoft Teams Installation and Guide]]</big><br />
* <big>[[Manage attendee audio permissions]]</big><br />
* <big>[[Schedule Microsoft Teams meeting from Microsoft Outlook]]</big><br />
* <big>[[How to Join Microsoft Teams meeting from web client]]</big><br />
* <big>[[Create a Class in MS Teams]]</big><br />
* <big>[[Change Meeting Permissions for Attendees through MS Teams]]</big><br />
<br />
<br />
<br />
'''<big>Configuration of VPN</big>''' [[File:download (6).1716183181171.png|frameless|27x27px]]<br />
*[[How to connect VPN-IVANTI (Students)|<big>How to connect VPN-IVANTI (Students)</big>]]<br />
*[[How to connect VPN-IVANTI (Staff)|<big>How to connect VPN-IVANTI (Staff)</big>]]<br />
<br />
'''<big>High Performance Computing cluster (Magus)</big>''' [[File:images (2).png|frameless|42x42px]]<br />
*<big>[[index.php?title=HPC|old HPC Magus01]]</big><br />
<br />
*<big>[[HPC Cluster Magus02]]</big><br />
*<big>[[Open FOAM]]</big><br />
*<big>[[Nanoelectronics Computation Laboratory - NCL]]</big><br /><br />
<br />
<br />
'''<big>Academia Installation</big>''' [[File:images.png|frameless|21x21px]]<br />
<br />
*<big>[[Academia NativeApps Client Installation]]</big><br /><br />
<br />
<br />
<br />
<big>'''DIGII Campus Application'''</big> [[File:download5678.png|frameless|38x38px]]<br />
*<big>[[How to create Request (For Night and Day Out Pass)]]</big><br />
*<big>[[How to download the Digii Campus Application]]</big><br />
*<big>[[How to login Collpoll Application- Parent's|How to login DigiiCampus Application- Parent's]]</big><br />
*<big>[[How to login in Digii (Formely Coll Poll)|How to login in DigiiCampus Application]] - '''For Students'''</big><br />
*[[Parental Approval Process|<big>Parental Approval Process</big>]] - <big>'''For Parent's'''</big><br /><br />
<br />
<br />
<big>'''Obtaining a Free Windows 11 Education License for Students'''</big> [[File:win11.1753764385890.jpg|frameless|38x38px]]<br />
*<big>[[Active students at University are eligible to obtain a free Windows 11 Education license]]</big><br />
<br />
<br />
====='''<big>[[Get Informed: Frequently Asked Questions"]]</big>'''=====<br />
|-<br />
|<br />
|}</div>
Deepak
https://wiki.snu.edu.in/index.php?title=Main_Page&diff=1165
Main Page
2026-03-20T05:15:01Z
<p>Deepak: hpc</p>
<hr />
<div>{| class="greyscale" style="width: 100%;" width="1334" data-mce-style="height: 26px ;background-color:#005197;"<br />
| style="background-color:;font-family:Verdana, Arial, Helvetica, sans-serif;font-size:11px;border:1px dashed rgb(187, 187, 187);" class="col-white-bg" |<br />
=== <span class="col-turquoise">Information Technology Resource Centre :</span> === <br />
'''<big>Configuration of Wi-Fi</big>''' [[File:down13.jpg|frameless|25x25px]]<br />
* [[Configuration of Wifi for Students|<big>Configuration of Wifi for Students</big>]]<br />
*[[Configuration of Wifi System for Guest|<big>Configuration of Wifi System for Guest</big>]]<br />
*[[How to Approve Guest Wifi Request|<big>How to Approve Guest Wifi Request</big>]]<br />
*[[How to connect Eduroam WIfi|<big>How to connect Eduroam WIfi</big>]] <br /><br />
<br />
<br />
<br />
'''<big>Net ID Setup</big>''' [[File:download (5).png|frameless|21x21px]]<br />
<br />
*[[Setting up your NetID Password|<big>Setting up your NetID Password</big>]] : <span lang="en" dir="ltr"><big>(First Time Setup, Forget Password, Change Password)</big></span><small><br /></small><br />
<br />
<br />
'''<big>Email ID Setup</big>''' [[File:download (8).1716959100424.jpg|frameless|25x25px]] <br />
<br />
* <big>[[Setting up your University Email ID Password.]]</big><br />
<br />
<br />
'''<big>Microsoft Teams Setup</big>''' [[File:RE1Mu3b.1747285649387.png|link=https://wiki.snu.edu.in/File:RE1Mu3b.1747285649387.png|frameless|101x101px]]<br />
<br />
* <big>[[Microsoft Teams Installation and Guide]]</big><br />
* <big>[[Manage attendee audio permissions]]</big><br />
* <big>[[Schedule Microsoft Teams meeting from Microsoft Outlook]]</big><br />
* <big>[[How to Join Microsoft Teams meeting from web client]]</big><br />
* <big>[[Create a Class in MS Teams]]</big><br />
* <big>[[Change Meeting Permissions for Attendees through MS Teams]]</big><br />
<br />
<br />
<br />
'''<big>Configuration of VPN</big>''' [[File:download (6).1716183181171.png|frameless|27x27px]]<br />
*[[How to connect VPN-IVANTI (Students)|<big>How to connect VPN-IVANTI (Students)</big>]]<br />
*[[How to connect VPN-IVANTI (Staff)|<big>How to connect VPN-IVANTI (Staff)</big>]]<br />
<br />
'''<big>High Performance Computing cluster (Magus)</big>''' [[File:images (2).png|frameless|42x42px]]<br />
*<big>[[old HPC Magus01|index.php?title=HPC]]</big><br />
<br />
*<big>[[HPC Cluster Magus02]]</big><br />
*<big>[[Open FOAM]]</big><br />
*<big>[[Nanoelectronics Computation Laboratory - NCL]]</big><br /><br />
<br />
<br />
'''<big>Academia Installation</big>''' [[File:images.png|frameless|21x21px]]<br />
<br />
*<big>[[Academia NativeApps Client Installation]]</big><br /><br />
<br />
<br />
<br />
<big>'''DIGII Campus Application'''</big> [[File:download5678.png|frameless|38x38px]]<br />
*<big>[[How to create Request (For Night and Day Out Pass)]]</big><br />
*<big>[[How to download the Digii Campus Application]]</big><br />
*<big>[[How to login Collpoll Application- Parent's|How to login DigiiCampus Application- Parent's]]</big><br />
*<big>[[How to login in Digii (Formely Coll Poll)|How to login in DigiiCampus Application]] - '''For Students'''</big><br />
*[[Parental Approval Process|<big>Parental Approval Process</big>]] - <big>'''For Parent's'''</big><br /><br />
<br />
<br />
<big>'''Obtaining a Free Windows 11 Education License for Students'''</big> [[File:win11.1753764385890.jpg|frameless|38x38px]]<br />
*<big>[[Active students at University are eligible to obtain a free Windows 11 Education license]]</big><br />
<br />
<br />
====='''<big>[[Get Informed: Frequently Asked Questions"]]</big>'''=====<br />
|-<br />
|<br />
|}</div>
Deepak
https://wiki.snu.edu.in/index.php?title=Main_Page&diff=1164
Main Page
2026-03-20T05:04:20Z
<p>Deepak: hpc</p>
<hr />
<div>{| class="greyscale" style="width: 100%;" width="1334" data-mce-style="height: 26px ;background-color:#005197;"<br />
| style="background-color:;font-family:Verdana, Arial, Helvetica, sans-serif;font-size:11px;border:1px dashed rgb(187, 187, 187);" class="col-white-bg" |<br />
=== <span class="col-turquoise">Information Technology Resource Centre :</span> === <br />
'''<big>Configuration of Wi-Fi</big>''' [[File:down13.jpg|frameless|25x25px]]<br />
* [[Configuration of Wifi for Students|<big>Configuration of Wifi for Students</big>]]<br />
*[[Configuration of Wifi System for Guest|<big>Configuration of Wifi System for Guest</big>]]<br />
*[[How to Approve Guest Wifi Request|<big>How to Approve Guest Wifi Request</big>]]<br />
*[[How to connect Eduroam WIfi|<big>How to connect Eduroam WIfi</big>]] <br /><br />
<br />
<br />
<br />
'''<big>Net ID Setup</big>''' [[File:download (5).png|frameless|21x21px]]<br />
<br />
*[[Setting up your NetID Password|<big>Setting up your NetID Password</big>]] : <span lang="en" dir="ltr"><big>(First Time Setup, Forget Password, Change Password)</big></span><small><br /></small><br />
<br />
<br />
'''<big>Email ID Setup</big>''' [[File:download (8).1716959100424.jpg|frameless|25x25px]] <br />
<br />
* <big>[[Setting up your University Email ID Password.]]</big><br />
<br />
<br />
'''<big>Microsoft Teams Setup</big>''' [[File:RE1Mu3b.1747285649387.png|link=https://wiki.snu.edu.in/File:RE1Mu3b.1747285649387.png|frameless|101x101px]]<br />
<br />
* <big>[[Microsoft Teams Installation and Guide]]</big><br />
* <big>[[Manage attendee audio permissions]]</big><br />
* <big>[[Schedule Microsoft Teams meeting from Microsoft Outlook]]</big><br />
* <big>[[How to Join Microsoft Teams meeting from web client]]</big><br />
* <big>[[Create a Class in MS Teams]]</big><br />
* <big>[[Change Meeting Permissions for Attendees through MS Teams]]</big><br />
<br />
<br />
<br />
'''<big>Configuration of VPN</big>''' [[File:download (6).1716183181171.png|frameless|27x27px]]<br />
*[[How to connect VPN-IVANTI (Students)|<big>How to connect VPN-IVANTI (Students)</big>]]<br />
*[[How to connect VPN-IVANTI (Staff)|<big>How to connect VPN-IVANTI (Staff)</big>]]<br />
<br />
'''<big>High Performance Computing cluster (Magus)</big>''' [[File:images (2).png|frameless|42x42px]]<br />
*<big>[[old HPC Magus01]]</big><br />
<br />
*<big>[[HPC Cluster Magus02]]</big><br />
*<big>[[Open FOAM]]</big><br />
*<big>[[Nanoelectronics Computation Laboratory - NCL]]</big><br /><br />
<br />
<br />
'''<big>Academia Installation</big>''' [[File:images.png|frameless|21x21px]]<br />
<br />
*<big>[[Academia NativeApps Client Installation]]</big><br /><br />
<br />
<br />
<br />
<big>'''DIGII Campus Application'''</big> [[File:download5678.png|frameless|38x38px]]<br />
*<big>[[How to create Request (For Night and Day Out Pass)]]</big><br />
*<big>[[How to download the Digii Campus Application]]</big><br />
*<big>[[How to login Collpoll Application- Parent's|How to login DigiiCampus Application- Parent's]]</big><br />
*<big>[[How to login in Digii (Formely Coll Poll)|How to login in DigiiCampus Application]] - '''For Students'''</big><br />
*[[Parental Approval Process|<big>Parental Approval Process</big>]] - <big>'''For Parent's'''</big><br /><br />
<br />
<br />
<big>'''Obtaining a Free Windows 11 Education License for Students'''</big> [[File:win11.1753764385890.jpg|frameless|38x38px]]<br />
*<big>[[Active students at University are eligible to obtain a free Windows 11 Education license]]</big><br />
<br />
<br />
====='''<big>[[Get Informed: Frequently Asked Questions"]]</big>'''=====<br />
|-<br />
|<br />
|}</div>
Deepak
https://wiki.snu.edu.in/index.php?title=NTP&diff=1143
NTP
2025-08-25T06:25:29Z
<p>Deepak: </p>
<hr />
<div><div style="font-family:'Segoe UI';font-size:14px;font-style:normal;font-weight:400;line-height:20px"><br />
----<br />
<br />
= π Network Time Protocol (NTP) Service =<br />
<br />
== Overview ==<br />
The '''Network Time Protocol (NTP)''' service ensures that devices connected to the SNU campus network maintain accurate and synchronized system clocks. This is essential for time-sensitive operations, logging, security protocols, and coordination across systems.<br />
<br />
== Key Features ==<br />
<br />
* Synchronizes device clocks with a known-good reference.<br />
* Maintains high accuracy across the network.<br />
* Supports '''NTP version 4''', with backward compatibility for versions 1, 2, and 3.<br />
* Available '''only within the SNU Campus Network'''.<br />
<br />
== Government of India Guidelines and Reference Servers ==<br />
<br />
* The NTP service complies with GOI cybersecurity guidelines issued by NIC and CERT-In, which mandate secure and authenticated time synchronization for all government and institutional networks.<br />
* SNU NTP servers synchronize to the microsecond level with upstream national time servers:<br />
* Samay.gov.in β Managed by the National Physical Laboratory (NPL), this server provides Indiaβs official time standard.<br />
* ntp.nic.in β Operated by the National Informatics Centre (NIC), ensuring secure and reliable time distribution.<br />
* These upstream servers are part of the national time infrastructure and are recommended for use in critical systems under the Cyber Security Doβs & Donβts framework.<br />
<br />
== User Synchronization ==<br />
<br />
* Devices within the SNU campus can synchronize directly with the SNU NTP servers to obtain highly accurate time, benefiting from the microsecond-level precision achieved through upstream synchronization with Samay and NIC servers.<br />
* This setup ensures consistent timekeeping across all campus systems, supporting secure logging, audit trails, and coordinated operations.<br />
<br />
== SNU NTP Servers ==<br />
The following servers are available for use within the campus:<br />
{| class="wikitable"<br />
!Step<br />
!Server Address<br />
!IP Address<br />
|-<br />
|1<br />
|<code>ntp01.snu.edu.in</code><br />
|''10.3.36.242''<br />
|-<br />
|2<br />
|<code>ntp02.snu.edu.in</code><br />
|''10.3.36.243''<br />
|-<br />
|3<br />
|<code>ntp03.snu.edu.in</code><br />
|''10.3.36.244''<br />
|}<br />
<blockquote>π‘ ''Note: These servers are accessible only from devices connected to the SNU campus network.''</blockquote><br />
----<br />
<br />
== Setup Instructions ==<br />
<br />
=== π₯οΈ Windows 10 / Windows 11 ===<br />
<br />
# Open '''Control Panel''' β '''Date and Time''' β '''Internet Time''' tab.<br />
# Click '''Change settings'''.<br />
# Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>) and click '''Update now'''.<br />
# Click '''OK''' to save.<br />
<br />
=== π§ Linux ===<br />
<br />
# Open terminal.<br />
# Edit the NTP configuration file: <span><span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span> <span> </span></span><br />
# Add the serv<span><span><span></span></span></span>er entries: server ntp01<span><span><span></span></span></span>.snu.edu.in server ntp02.snu.edu.in server ntp03.snu.edu.in<br />
# Restart the NTP service: <span><span><span></span> </span> <code preview="Code" class="language-Shell">sudo systemctl restart n</code><span><span></span></span><code class="language-Shell" preview="Code">tp</code> <span> </span></span><br />
<br />
=== π macOS ===<br />
<br />
#<span><span><span></span></span></span>Open '''System Settings''' β '''Date'''<span><span><span></span></span></span> '''& Time'''.<br />
# Unlock settings and enable '''Set date and time automatically'''.<br />
# Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>).<br />
<br />
----<br />
<br />
== Support ==<br />
For assistance or troubleshooting, please contact the '''SNU IT Helpdesk''' ithelpdesk@snu.edu.in.<br />
----</div><br />
<br />
== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> ==<br />
<br />
* [[wikipedia:Network_Time_Protocol|About NTP service ( Wikipedia )]]</div>
Deepak
https://wiki.snu.edu.in/index.php?title=NTP&diff=1106
NTP
2025-08-18T05:39:21Z
<p>Deepak: </p>
<hr />
<div><div style="font-family:'Segoe UI';font-size:14px;font-style:normal;font-weight:400;line-height:20px"><br />
----<br />
<br />
= π Network Time Protocol (NTP) Service =<br />
<br />
== Overview ==<br />
The '''Network Time Protocol (NTP)''' service ensures that devices connected to the SNU campus network maintain accurate and synchronized system clocks. This is essential for time-sensitive operations, logging, security protocols, and coordination across systems.<br />
<br />
== Key Features ==<br />
<br />
* Synchronizes device clocks with a known-good reference.<br />
* Maintains high accuracy across the network.<br />
* Supports '''NTP version 4''', with backward compatibility for versions 1, 2, and 3.<br />
* Available '''only within the SNU Campus Network'''.<br />
<br />
== SNU NTP Servers ==<br />
The following servers are available for use within the campus:<br />
{| class="wikitable"<br />
!Step<br />
!Server Address<br />
!IP Address<br />
|-<br />
|1<br />
|<code>ntp01.snu.edu.in</code><br />
|''10.3.36.242''<br />
|-<br />
|2<br />
|<code>ntp02.snu.edu.in</code><br />
|''10.3.36.243''<br />
|-<br />
|3<br />
|<code>ntp03.snu.edu.in</code><br />
|''10.3.36.244''<br />
|}<br />
<blockquote>π‘ ''Note: These servers are accessible only from devices connected to the SNU campus network.''</blockquote><br />
----<br />
<br />
== Setup Instructions ==<br />
<br />
=== π₯οΈ Windows 10 / Windows 11 ===<br />
<br />
# Open '''Control Panel''' β '''Date and Time''' β '''Internet Time''' tab.<br />
# Click '''Change settings'''.<br />
# Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>) and click '''Update now'''.<br />
# Click '''OK''' to save.<br />
<br />
=== π§ Linux ===<br />
<br />
# Open terminal.<br />
# Edit the NTP configuration file: <span><span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span> <span> </span></span><br />
# Add the serv<span><span><span></span></span></span>er entries: server ntp01<span><span><span></span></span></span>.snu.edu.in server ntp02.snu.edu.in server ntp03.snu.edu.in<br />
# Restart the NTP service: <span><span><span></span> </span> <code preview="Code" class="language-Shell">sudo systemctl restart n</code><span><span></span></span><code class="language-Shell" preview="Code">tp</code> <span> </span></span><br />
<br />
=== π macOS ===<br />
<br />
#<span><span><span></span></span></span>Open '''System Settings''' β '''Date'''<span><span><span></span></span></span> '''& Time'''.<br />
# Unlock settings and enable '''Set date and time automatically'''.<br />
# Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>).<br />
<br />
----<br />
<br />
== Support ==<br />
For assistance or troubleshooting, please contact the '''SNU IT Helpdesk''' ithelpdesk@snu.edu.in.<br />
----</div><br />
<br />
== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> ==<br />
<br />
* [[wikipedia:Network_Time_Protocol|About NTP service ( Wikipedia )]]</div>
Deepak
https://wiki.snu.edu.in/index.php?title=NTP&diff=1103
NTP
2025-08-14T05:20:25Z
<p>Deepak: </p>
<hr />
<div><div style="font-family:'Segoe UI';font-size:14px;font-style:normal;font-weight:400;line-height:20px"><br />
----<br />
<br />
= π Network Time Protocol (NTP) Service =<br />
<br />
== Overview ==<br />
The '''Network Time Protocol (NTP)''' service ensures that devices connected to the SNU campus network maintain accurate and synchronized system clocks. This is essential for time-sensitive operations, logging, security protocols, and coordination across systems.<br />
<br />
== Key Features ==<br />
<br />
* Synchronizes device clocks with a known-good reference.<br />
* Maintains high accuracy across the network.<br />
* Supports '''NTP version 4''', with backward compatibility for versions 1, 2, and 3.<br />
* Available '''only within the SNU Campus Network'''.<br />
<br />
== SNU NTP Servers ==<br />
The following servers are available for use within the campus:<br />
{| class="wikitable"<br />
!Step<br />
!Server Address<br />
!IP Address<br />
|-<br />
|1<br />
|<code>ntp01.snu.edu.in</code><br />
|''(IP to be added)''<br />
|-<br />
|2<br />
|<code>ntp02.snu.edu.in</code><br />
|''(IP to be added)''<br />
|-<br />
|3<br />
|<code>ntp03.snu.edu.in</code><br />
|''(IP to be added)''<br />
|}<br />
<blockquote>π‘ ''Note: These servers are accessible only from devices connected to the SNU campus network.''</blockquote><br />
----<br />
<br />
== Setup Instructions ==<br />
<br />
=== π₯οΈ Windows 10 / Windows 11 ===<br />
<br />
# Open '''Control Panel''' β '''Date and Time''' β '''Internet Time''' tab.<br />
# Click '''Change settings'''.<br />
# Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>) and click '''Update now'''.<br />
# Click '''OK''' to save.<br />
<br />
=== π§ Linux ===<br />
<br />
# Open terminal.<br />
# Edit the NTP configuration file: <span><span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span> <span> </span></span><br />
# Add the serv<span><span><span></span></span></span>er entries: server ntp01<span><span><span></span></span></span>.snu.edu.in server ntp02.snu.edu.in server ntp03.snu.edu.in<br />
# Restart the NTP service: <span><span><span></span> </span> <code preview="Code" class="language-Shell">sudo systemctl restart n</code><span><span></span></span><code class="language-Shell" preview="Code">tp </code> <span> </span></span><br />
<br />
=== π macOS ===<br />
<br />
#<span><span><span></span></span></span>Open '''System Settings''' β '''Date'''<span><span><span></span></span></span> '''& Time'''.<br />
# Unlock settings and enable '''Set date and time automatically'''.<br />
# Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>).<br />
<br />
----<br />
<br />
== Support ==<br />
For assistance or troubleshooting, please contact the '''SNU IT Helpdesk''' ithelpdesk@snu.edu.in.<br />
----</div><br />
<br />
== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> ==<br />
<br />
* [[wikipedia:Network_Time_Protocol|About NTP service ( Wikipedia )]]</div>
Deepak
https://wiki.snu.edu.in/index.php?title=NTP&diff=1102
NTP
2025-08-13T12:19:11Z
<p>Deepak: </p>
<hr />
<div><div style="font-family:'Segoe UI';font-size:14px;font-style:normal;font-weight:400;line-height:20px"><br />
----<br />
<br />
= π Network Time Protocol (NTP) Service =<br />
<br />
== Overview ==<br />
The '''Network Time Protocol (NTP)''' service ensures that devices connected to the SNU campus network maintain accurate and synchronized system clocks. This is essential for time-sensitive operations, logging, security protocols, and coordination across systems.<br />
<br />
== Key Features ==<br />
<br />
* Synchronizes device clocks with a known-good reference.<br />
* Maintains high accuracy across the network.<br />
* Supports '''NTP version 4''', with backward compatibility for versions 1, 2, and 3.<br />
* Available '''only within the SNU Campus Network'''.<br />
<br />
== SNU NTP Servers ==<br />
The following servers are available for use within the campus:<br />
{| class="wikitable"<br />
!Step<br />
!Server Address<br />
!IP Address<br />
|-<br />
|1<br />
|<code>ntp01.snu.edu.in</code><br />
|''(IP to be added)''<br />
|-<br />
|2<br />
|<code>ntp02.snu.edu.in</code><br />
|''(IP to be added)''<br />
|-<br />
|3<br />
|<code>ntp03.snu.edu.in</code><br />
|''(IP to be added)''<br />
|}<br />
<blockquote>π‘ ''Note: These servers are accessible only from devices connected to the SNU campus network.''</blockquote><br />
----<br />
<br />
== Setup Instructions ==<br />
<br />
=== π₯οΈ Windows 10 / Windows 11 ===<br />
<br />
# Open '''Control Panel''' β '''Date and Time''' β '''Internet Time''' tab.<br />
# Click '''Change settings'''.<br />
# Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>) and click '''Update now'''.<br />
# Click '''OK''' to save.<br />
<br />
=== π§ Linux ===<br />
<br />
# Open terminal.<br />
# Edit the NTP configuration file: <span><span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span></span><br />
# Add the server entries: server ntp01.snu.edu.in server ntp02.snu.edu.in server ntp03.snu.edu.in<br />
# Restart the NTP service: <span><span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span> <code preview="Code" class="language-Shell">sudo systemctl restart ntp </code> <span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span></span><br />
<br />
=== π macOS ===<br />
<br />
# Open '''System Settings''' β '''Date & Time'''.<br />
# Unlock settings and enable '''Set date and time automatically'''.<br />
# Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>).<br />
<br />
----<br />
<br />
== Support ==<br />
For assistance or troubleshooting, please contact the '''SNU IT Helpdesk''' ithelpdesk@snu.edu.in.<br />
----</div><br />
<br />
== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> ==<br />
<br />
* [[wikipedia:Network_Time_Protocol|About NTP service ( Wikipedia )]]</div>
Deepak
https://wiki.snu.edu.in/index.php?title=NTP&diff=1101
NTP
2025-08-13T12:08:59Z
<p>Deepak: Replaced content with "== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> == * About NTP service ( Wikipedia )"</p>
<hr />
<div>== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> ==<br />
<br />
* [[wikipedia:Network_Time_Protocol|About NTP service ( Wikipedia )]]</div>
Deepak
https://wiki.snu.edu.in/index.php?title=MediaWiki:Sidebar&diff=1100
MediaWiki:Sidebar
2025-08-13T10:42:01Z
<p>Deepak: </p>
<hr />
<div><br />
* navigation</div>
Deepak
https://wiki.snu.edu.in/index.php?title=NTP&diff=1099
NTP
2025-08-13T10:40:51Z
<p>Deepak: Created page with "== <span class="mw-headline" style="box-sizing: border-box;" id="NTP_.28Network_Time_Protocol.29_service"><span style="box-sizing: border-box; color: rgb(0, 29, 53); font-fami..."</p>
<hr />
<div>== <span class="mw-headline" style="box-sizing: border-box;" id="NTP_.28Network_Time_Protocol.29_service"><span style="box-sizing: border-box; color: rgb(0, 29, 53); font-family: &quot;Google Sans&quot;, Arial, sans-serif; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;"><big style="box-sizing: border-box;">'''NTP (Network Time Protocol) service'''</big></span></span> ==<br />
<span style="box-sizing: border-box; color: rgb(55, 65, 81); font-family: Inter; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;">Network Time Protocol (NTP) Service allows devices to set their date/time clock to a known-good clock, and to keep their clock synchronized with a high degree of accuracy.</span><br />
<br />
<span style="box-sizing: border-box; color: rgb(55, 65, 81); font-family: Inter; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;">SNU IT provides several NTP servers for use by devices attached to the campus network. our servers supports version 4 of the Network Time Protocol, and provide backward-compatibility with version 1, version 2, and version 3. These NTP settings will work only within SNU Campus Network</span><br />
{| class="wikitable" style="box-sizing: border-box; font-size: 16.8143px; caption-side: top; border-collapse: collapse; overflow-x: auto; word-break: normal; background-color: rgb(248, 249, 250); color: rgb(32, 33, 34); margin: 1em 0px; border: 1px solid rgb(162, 169, 177); font-family: Arial, &quot;sans-serif&quot;; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 500; letter-spacing: normal; orphans: 2; text-align: start; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; width: 1120px;"<br />
! style="background-color:rgb(234, 236, 240);vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" class="" |Step<br />
! style="background-color:rgb(234, 236, 240);text-align:center;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" class="" |Servers<br />
! style="background-color:rgb(234, 236, 240);text-align:center;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" class="" |IP<br />
|- style="box-sizing: border-box; border-color: inherit; border-style: solid; border-width: 0px;"<br />
| style="vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |1<br />
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |ntp01.snu.edu.in<br />
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |<br />
|- style="box-sizing: border-box; border-color: inherit; border-style: solid; border-width: 0px;"<br />
| style="vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |2<br />
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |ntp02.snu.edu.in<br />
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |<br />
|- style="box-sizing: border-box; border-color: inherit; border-style: solid; border-width: 0px;"<br />
| style="vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |3<br />
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |ntp03.snu.edu.in<br />
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |<br />
|}<br />
<br />
=== <span class="mw-headline" style="box-sizing: border-box;" id="Instructions_to_setup_NTP_on_your_machine">Instructions to setup NTP on your machine</span> ===<br />
<br />
# Windows 10<br />
# Windows 11<br />
# Linux<br />
# Mac<br />
<br />
== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> ==<br />
<br />
* [[wikipedia:Network_Time_Protocol|About NTP service ( Wikipedia )]]</div>
Deepak
https://wiki.snu.edu.in/index.php?title=Sandbox&diff=1098
Sandbox
2025-08-13T10:38:17Z
<p>Deepak: New Page</p>
<hr />
<div>==<span style="color: rgb(0, 29, 53); font-family: &quot;Google Sans&quot;, Arial, sans-serif; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;"><big>'''NTP (Network Time Protocol) service'''</big></span>==<br />
<span style="color: rgb(55, 65, 81); font-family: Inter; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">Network Time Protocol (NTP) Service allows devices to set their date/time clock to a known-good clock, and to keep their clock synchronized with a high degree of accuracy.</span><br />
<br />
<span style="color: rgb(55, 65, 81); font-family: Inter; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">SNU IT provides several NTP servers for use by devices attached to the campus network. our servers supports version 4 of the Network Time Protocol, and provide backward-compatibility with version 1, version 2, and version 3. These NTP settings will work only within SNU Campus Network</span><br />
<br />
{| class="wikitable" style="width:100%;"<br />
! style="vertical-align:middle;text-align:center;width:80px;" |Step<br />
!Servers<br />
!IP<br />
|-<br />
| style="vertical-align:middle;text-align:center;width:80px;" |1<br />
|ntp01.snu.edu.in<br />
|<br />
|-<br />
| style="vertical-align:middle;text-align:center;width:80px;" |2<br />
|ntp02.snu.edu.in<br />
|<br />
|-<br />
| style="vertical-align:middle;text-align:center;width:80px;" |3<br />
|ntp03.snu.edu.in<br />
|<br />
|}<br />
<br />
===Instructions to setup NTP on your machine===<br />
<br />
#Windows 10<br />
#Windows 11<br />
#Linux <br />
#Mac<br />
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==Related pages==<br />
<br />
*[[wikipedia:Network_Time_Protocol|About NTP service ( Wikipedia )]]</div>
Deepak