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FAQS

Accessing NSCC Petascale Supercomputer

1. What is 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.

2. What are the specs of each node?

Please see the below table for details

Server CPU Model Number of Cores Number of Sockets Effective cores/server Available RAM GPUs
Standard Compute Node E5-2690 v3 @ 2.60GHz 12 2 24 128 GB No GPU
GPU compute node E5-2690 v3 @ 2.60GHz 12 2 24 128 GB One Tesla K40t
Large memory node E7-4830 v3 @ 2.10GHz 12 2 24 1TB No GPU
Large memory node E7-4830 v3 @ 2.10GHz 12 4 48 1TB No GPU
Large memory node E7-4830 v3 @ 2.10GHz 12 4 48 2TB No GPU
Large memory node E7-4830 v3 @ 2.10GHz 12 4 48 6TB

3. Does NSCC have any Windows Operating system?

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.

4. How do I enroll to get access to NSCC Petascale Supercomputer?

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 “Enrollment user guide” from “User Guide” page for the users from above mentioned organizations.

5. I’m an NUS user and my NUS ID is in NUSEXT domain, and I cannot register through Enrollment system, what is the reason.

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

6. What are my Log-on credentials

NSCC Supercomputer enrollment system is integrated with SingaAREN. For users from A*Star, NUS (except NUSEXT doman), NTU can enroll them self by 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 SingaAREN or commercial users (including NUSEXT domain users) has to send an email to [email protected] with the following details:

User ID (desired, preferrably same login ID which you are using in your organization, limited to 8 characters) :First Name :Last name :email :Organization name : Note: Login ID creation is subjected to availability and approvals.
7. How do I login to NSCC?

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

8. How do I access NSCC?

To utilize 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

Entity Operating System Host/FQDN Tool/Function File transfer
NUS Windows nus.nscc.sg putty
MobaXterm
SSH Secure client
FileZilla
Winscp
SSH Secure client
  Linux/Unix/MAC nus.nscc.sg Terminal/SSH FileZilla (OSX)
FileZilla (Linux)
SCP
rsync
  All https://nusweb.nscc.sg PBS Compute Manager/Display Manager PBS Compute Manager
NTU Windows ntu.nscc.sg putty
MobaXterm
SSH Secure client
FileZilla
Winscp
SSH Secure client
  Linux/Unix/MAC ntu.nscc.sg Terminal/SSH FileZilla (OSX)
FileZilla (Linux)
SCP
rsync
  All https://ntuweb.nscc.sg PBS Compute Manager/Display Manager PBS Compute Manager
ASTAR Windows astar.nscc.sg putty
MobaXterm
SSH Secure client
FileZilla
Winscp
SSH Secure client
  Linux/Unix/MAC astar.nscc.sg Terminal/SSH FileZilla (OSX)
FileZilla (Linux)
SCP
rsync
  All https://astar.nscc.sg PBS Compute Manager/Display Manager  PBS Compute Manager
  Linux/Unix/MAC stud.nscc.sg Terminal/SSH FileZilla (OSX)
FileZilla (Linux)
SCP
rsync
  All https://sutd.nscc.sg PBS Compute Manager/Display Manager  PBS Compute Manager
Direct users

VPN Guide
VPN URL

Windows aspire.nscc.sg putty
MobaXterm
SSH Secure client
FileZilla
Winscp
SSH Secure client
Linux/Unix/MAC aspire.nscc.sg Terminal/SSH FileZilla
SCP
rsync
All https://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 host name and click on Open button (Putty may allow you to login automatically without asking for 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

9. How do I download files from internet?

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 internet

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

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

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

10. I receive error with puttygen.exe. Error message being: Could’t load private key (unrecognised key type).

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

11. How do I access NSCC from my home?

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

12. Why I’m restricted to use NSCC Petascale Supercomputer?

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.

13. How do I change my password?

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

14. I forgot my password. Can I have it reset?

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

15. How complex should my NSCC Password be?
16. Where do I find information about NSCC

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.

17. What is a core and CPU?

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.

18. What is PBS Compute Manager

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

19. What is PBS Display Manager

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

© NATIONAL SUPERCOMPUTING CENTRE (NSCC) SINGAPORE 2017