College of Engineering &

Computer Science

RaiderHPC

WSU's High Performance Computing Center

- Frequently Asked Questions -

I want to use some of the compute nodes interactively, how do I do this through the Queue?

Use the following command along with the proper number of nodes and time you need:

           qsub -l nodes=1,walltime=24:00:00 -I

Once the desired nodes are available, you'll automatically be logged into the head node.  The environmental variable $PBS_NODEFILE points to a file which contains a list of your assigned nodes from the queue system.  You can use this to run parallel jobs interactively like this:

           mpirun -np 2 -machinefile $PBS_NODEFILE my_prog.x

How do I prevent my job from being re-run automatically by the queue due to a system problem?

Add the following option into your job script:

            #PBS -r n

This tells the queue system that your job is not to rerun in case a system problem (such a node unexpectantly going offline).