Magus02

What is HPC?

High performance computing (HPC) is the ability to process data and perform complex calculations at high speeds. To put it into perspective, a laptop or desktop with a 3 GHz processor can perform around 3 billion calculations per second. While that is much faster than any human can achieve, it pales in comparison to HPC solutions that can perform quadrillions of calculations per second.

HPC is specifically needed for these reasons:

It paves the way for new innovations in science, technology, business and academia.
It improves processing speeds, which can be critical for many kinds of computing operations, applications and workloads.
It helps lay the foundation for a reliable, fast IT infrastructure that can store, process and analyze massive amounts of data for various applications.

Specification:

Total Cores = 8064 (AMD)
238 Tflops
57 Compute Nodes
2 Login Nodes
2 Master Nodes
12 High memory nodes with local SSD
Better performance of applications, which require high performance storage but do not scale well across nodes. E.g. Gaussian.

Memory

4 GB Per core for Compute Nodes, with a total memory = 29,184 GB
16 GB Per core for High Memory Nodes, with total memory = 12,288 GB

Compute Specification:

COMPUTE NODES	PROCESSOR	RAM	CORE	GPU	NO OF NODES	TOTAL RAM	TOTAL CORES

Compute Node	AMD EPYC 7763	512 GB	128	-	57	29184GB	7296
High Memory Node	AMD EPYC 7543	1024GB	64	-	12	12228GB	768
GPU	INTEL XEON PLATINUM 8358	512GB	64	Tesla A100*4	2	1024GB	128
Total						42436	8192
Storage	750TB PFS

How to connect to Snu HPC ?

Enumerated here are the various types.

SSH : Host magus02.snu.edu.in ( default port 22 )
From Linux Machine : $ssh [email protected]
From Windows Machine using putty.

How to Reset Password on Magus02 ?

Step1. Login to magus02 account.

Step2: Use Passwd Command.

How to Connect to Magus from outside SNU Network ?

To gain access to MEGUS from outside the SNU network, a VPN connection is mandatory. To acquire VPN access, kindly click on the VPN Request Form or utilize the option of accessing it by scanning the barcode provided below.

How to Transfers data using WinSCP Windows (Client).

Step1 : Open the WinSCP and fill all the details, After that click on the Login Button.

Step 2 : Click Yes on Warning tab.

Step 3: Connected, Now you can transfer the data using Right click of key Panel.

Applications on Megus

Vasp, Quantum espresso, BigDFT, Gaussian, Siesta, Gromacs, OpenFOAM.

Queue Structure on Magus02.

S.No.	Processor Architecture	Priority	Queue Name	Min no of Cores Required to submit job	Max no of cores allowed per job	No of nodes in the queue	Wall Time	MAX Cores User can Use in the Queue	Max No. of Pending Jobs Per user
1	AMD EPYC 7763	50	serial_test	1	1	1	1 hour	Unlimited	Unlimited
2	AMD EPYC 7763	50	Medium	32	128	16	1 week	512	4
3	AMD EPYC 7543	50	Small	8	32	16	1 week	256	2
4	AMD EPYC 7543	50	High_mem	32	256	10	2 weeks	512	2
5	AMD EPYC 7763	50	Large	64	256	25	2 weeks	1024	2
6	AMD EPYC 7763	50	Large_io	8	32	2	1 week	32	1
7	Intel Xeon Platinum 8358	50	GPU	16	16	2	1 week	32	1
8	AMD EPYC 7763	Low	Long	32	1024	All lm nodes	1 Month	1024	1
9	AMD EPYC 7763	Low	Serial_long	1	1	1	1 week	Unlimited	Unlimited

Slurm Command Reference:

Linux_Command_Reference.pdf