Login Nodes Versus Compute Nodes

Login Nodes vs. Compute Nodes

The cluster consists of login nodes and compute nodes, along with a few other nodes for administration and serving files. The login nodes are shared, and at any time a login node might be in use by 10 or 20 users. For that reason, CPU- and memory-intensive jobs, as well any code that runs a risk of crashing a machine, should be run only on the compute nodes.

I commented out some code here. We need to put in a better discussion of nodes, names, and maybe queues here......Larry

Compute nodes can be used both for batch jobs and for interactive jobs. See below for how use a node interactively, and how to run GUI applications on a node.

The login nodes are named

login1, login2, login3, and login4

and the compute nodes are named

n001, n002, ..., n091, n092 for jobs run out the the BATCH queue

and

p001, p002, ..., p011, p012 for jobs run out of the NHTSA queue

and

a001 for jobs run out of the ARROW queue