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The Dirac cluster has 5 hosts each with 12-16 cores each and 4 GB of RAM per core. Currently there is no batch system setup, so you can simply log into any of these hosts and run programs. Here is the list of hosts.

• dirac1.calpoly.edu
• dirac2.calpoly.edu
• dirac3.calpoly.edu
• dirac4.calpoly.edu
• dirac5.calpoly.edu

All of these hosts should be reachable from on campus and dirac1.calpoly.edu should be reachable from off campus. However, the best way to reach all of the hosts from off campus is to setup the Cal Poly VPN, which will make you computer appear like it is on campus:

http://www.netadmin.calpoly.edu/content/services/vpn

We have a 6th host (dirac0.calpoly.edu) that provides storage for the cluster, but you shouldn't use that for running code.

Logging into the hosts

The cluster authentication is integrated with Cal Poly’s central authentication. This means that you will use your main Cal Poly username and password to log into the computers. By default, all students and faculty in the College of Science and Mathematics have accounts. If you need a student or class from a different college to have access to the cluster, please let me know and I will add them.

To ssh from your laptop/desktop to one of the systems:

ssh username@dirac1.calpoly.edu

To ssh with X11 forwarding enabled:

ssh -Y username@dirac1.calpoly.edu

To ssh between hosts in the cluster you can simple give the hostname:

ssh dirac2

You can also add the -Y flag when going between hosts and the X11 windows will be forwarded.

Once you have logged into the cluster a single time using SSH, you can also log in using your web browser at https://dirac1.calpoly.edu.