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Accessing NSCC Petascale Supercomputer

NSCC Petascale supercomputer is built on x86 based architecture, with initial benchmarks of 1.01 PFLOPS of compute throughput, 13 PetaBytes tiered storage, with burst I/O of up to 500GBytes/sec. This supercomputer has 1,288 nodes and about 30,000 cores, including 128 GPU nodes, a few high memory nodes from 1TB, 2TB and 6TB RAM. We will have login nodes in NUS, NTU and A*STAR extended with DTN-Infiniband-longrange link.  

Please see the below table for details

ServerCPU ModelNumber of CoresNumber of SocketsEffective cores/serverAvailable RAMGPUs
Standard Compute NodeE5-2690 v3 @ 2.60GHz12224128 GBNo GPU
GPU compute nodeE5-2690 v3 @ 2.60GHz12224128 GBOne Tesla K40t
Large memory nodeE7-4830 v3 @ 2.10GHz122241TBNo GPU
Large memory nodeE7-4830 v3 @ 2.10GHz124481TBNo GPU
Large memory nodeE7-4830 v3 @ 2.10GHz124482TBNo GPU
Large memory nodeE7-4830 v3 @ 2.10GHz124486TB

NSCC Petascale supercomputer is built on Opensource Linux platform and currently does not have any Microsoft Windows-based cluster. However, if there is a specific requirement, please contact us through https://helpdesk.nscc.sg and register your request for us to work on your requirement.

NSCC enrollment system is Federated with SingAREN to facilitate users from NUS, NTU, A*Star to enroll seamlessly to NSCC System. Please follow the instructions presented in the “Enrollment user guide” from the “User Guide” page for the users from above-mentioned organisations.

NUSEXT domain users are considered as external users for NUS. Please contact NSCC helpdesk ([email protected]) for an appropriate procedure to get authentication credentials.

NSCC Supercomputer enrollment system is integrated with SingAREN. For users from A*Star, NUS (except NUSEXT doman), NTU can enroll them self by navigating through “User Services -> Enrollment”. For more information on enrollment/password reset Please follow the User Enrollment guide or Password Reset guide and enroll yourself to NSCC System.

For non-SingAREN or commercial users (including NUSEXT domain users) has to send an email to [email protected] with the following details:

User ID (preferably same login ID which you are using in your organization, limited to 8 characters) :
First Name :
Last name :
Email :
Organisation name :
 
Note: Login ID creation is subjected to availability and approvals.

Please refer to the next question “How do I access NSCC?”

To utilise NSCC Petascale Supercomputer resources, you need to login to the cluster. Please follow the below table to determine the way to access NSCC Petascale Supercomputer.

SUTDWindowssutd.nscc.sgputty
MobaXterm
SSH Secure clientFileZilla
Winscp
SSH Secure client

EntityOperating SystemHost/FQDNTool/FunctionFile transfer
NUSWindowsnus.nscc.sgputty
MobaXterm
SSH Secure client
FileZilla
Winscp
SSH Secure client
 Linux/Unix/MACnus.nscc.sgTerminal/SSHFileZilla (OSX)
FileZilla (Linux)
SCP
rsync
 Allhttps://nusweb.nscc.sgPBS Compute Manager/Display ManagerPBS Compute Manager
NTUWindowsntu.nscc.sgputty
MobaXterm
SSH Secure client
FileZilla
Winscp
SSH Secure client
 Linux/Unix/MACntu.nscc.sgTerminal/SSHFileZilla (OSX)
FileZilla (Linux)
SCP
rsync
 Allhttps://ntuweb.nscc.sgPBS Compute Manager/Display ManagerPBS Compute Manager
ASTARWindowsastar.nscc.sgputty
MobaXterm
SSH Secure client
FileZilla
Winscp
SSH Secure client
 Linux/Unix/MACastar.nscc.sgTerminal/SSHFileZilla (OSX)
FileZilla (Linux)
SCP
rsync
 Allhttps://astar.nscc.sgPBS Compute Manager/Display Manager PBS Compute Manager
 Linux/Unix/MACstud.nscc.sgTerminal/SSHFileZilla (OSX)
FileZilla (Linux)
SCP
rsync
 Allhttps://sutd.nscc.sgPBS Compute Manager/Display Manager PBS Compute Manager

Direct users

VPN Guide
VPN URL

Windowsaspire.nscc.sg

putty
MobaXterm
SSH Secure client

FileZilla
Winscp
SSH Secure client
 Linux/Unix/MACaspire.nscc.sgTerminal/SSHFileZilla
SCP
rsync
 Allhttps://aspireweb.nscc.sg

PBS Compute Manager

PBS Display manager

PBS Compute Manager

Follow the below instructions to connect to NSCC Supercomputer through portal.

  • Open the web browser and browse for the URL provided above.
  • Use the credentials of your organization to login to this portal and access NSCC Supercomputer.

Below instructions to connect using SSH/SCP on Unix/Mac PC:

  • Open the terminal
  • Type “ssh [email protected]”
  • Enter the password (characters are invisible while typing the password)
  • Once logged in successfully you should be able to see a “$” prompt, allow you to type commands

If you want to use X11 interface, replace the above ssh command with ssh -X.

For X11 – ssh -Y, make sure you installed XQuartz for OS X 10.8 or higher.

Connecting from Windows:

  • Open putty or MobaXterm
  • In case of putty, type the login hostname and click on Open button (Putty may allow you to log in automatically without asking for the password. In case if putty asks for username/password, you need to type the login ID and password from your university.)
  • In case of MobaXterm, type to command at the prompt “ssh [email protected]”
  • Upon successful login, you will be prompted with “$” to use NSCC Supercomputer

Internet access from remote login nodes are disabled due to security reasons however, users can still download files using other methods of download.

A*Star Users – login to astar-exanet.nscc.sg and download files from the internet

NUS users – ssh to login.nscc.sg and download files from the internet

NTU users – ssh to login.nscc.sg and download files from the internet

Direct Users – ssh to aspire.nscc.sg and download files from the internet

The key generated in the enrollment portal need to be converted using openssl with the command:
“openssl rsa -in old.key -out new.key”

Then the new.key can be loaded by puttygen.
Note: this need to be done only when using puttgen.exe and when facing the error

In order to connect to NSCC login nodes stated in “How do I access NSCC?” FAQ, first you need to connect to your respective organisation VPN and use your preferred method to connect.

During the alpha phase there are no restrictions, however, should you face any restrictions, please log a ticket through the service desk portal https://servicedesk.nscc.sg/. Our technical specialist will investigate the reason.

Please follow the password reset guide and follow the step-by-step instructions.

Please follow the Password Reset guide and follow the step-by-step instructions.

There are few URLs where most of the information about NSCC is available.

http://nscc.sg – Corporate Website

http://beta.nscc.sg – Technical information about NSCC Supercomputer beta phase

http://workshop.nscc.sg – All NSCC related information can be found here

https://help.nscc.sg – Information pertaining to usage of NSCC Super computer and other technical details.

The term core or CPU is interchangeably used in many cases. For example, a server that consists of 2 sockets with each socket with 12 cores that means you get 24 computation cores to be used in the server. This means that your MPI which can use one core per process, can span 24 processes in the server.

PBS Compute Manager is a graphical user interface which facilitates users to run, monitor, and manage the jobs with NSCC Supercomputer.

PBS Display Manager is a graphical user interface which facilitates users to run graphics intensive applications in NSCC Supercomputer.

© NATIONAL SUPERCOMPUTING CENTRE (NSCC) SINGAPORE 2019