How do I exclude a node from running a job?

Sometimes it is useful to exclude a specific node from running your jobs. This can be due to hardware or software problems on that node. For instance the node seems to have problems with the interconnect.

The simplest way to do this is to submit a dummy job to this node:

echo sleep 600 | qsub -lnodes=cX-Y:ppn=8,walltime=1000

Then this job will be running a sleep job for 600 seconds and you can submit your real job afterwards that will run on other nodes. This will cost you some cpu hours off your quota, but let us know and we will refund this to you later.

Please let us know if you think some nodes have problems.