MBOT Cluster

This is a private cluster

• PIs:
  • Nils Deppe, Physics
  • Anna Ho, Astronomy
• Projects:
  • nd357_0001
  • ayh24_0001

Documentation

https://github.com/sxs-collaboration/WelcomeToSXS/wiki/Mbot

Hardware

• Head node: mbot.cac.cornell.edu.
• Access modes: ssh
• OpenHPC 3 with Rocky Linux 9
• 9 compute nodes (c0001-c0009) with dual 96-core AMD EPYC processors, 384GB of RAM
• Hyperthreading is disabled on all nodes.
• Interconnect is InfiniBand HDR from each node to the HDR switch
• Submit HELP requests: help OR by sending an email to help@cac.cornell.edu?Subject=MBOT.

Initial Login via SSH Key

After being added to either the nd357_0001 or ayh24_0001 project, you can

1. Log into the CAC Portal by clicking on the Login button in the upper right corner.

2. Choose Cornell University as your organizational login and complete the login using your Cornell NetID and password (not your CAC account password).

3. On the Portal dashboard, click on the Generate SSH key pair link in the Manage your CAC login credentials section in the upper right corner.

4. Click on the Generate a new SSH key button to generate a new ssh key pair.

5. Click on the Download your SSH private key button to download the private key to your computer.

6. On your computer, make sure the private key file is readable and writable to you only: chmod 600 <private key file>

7. SSH to mbot cluster using the private key you just downloaded: ssh -i <path to the private key file> <NetID>@mbot.cac.cornell.edu

8. On mbot, you can add additional public ssh keys to your ~/.ssh/authorized_keys file, 1 key per line. The key generated by CAC Portal is marked by the CAC_SSO comment in the authorized_keys file. Keys that do not end in CAC_SSO will be left alone by CAC Portal.