Qsub

The cluster uses the qsub system. The Job scheduler is responsible to make all the houskeeping within the cluster.

Start your job

$ qsub 8 example.sh

• qsub is the command
• 8 is the numer of CPU you want to use this will be inserted in your jobfile in variable: $NSLOTS
• example.sh is the jobfile you transmitted to cluster.

system will give you an output like this:

Your job 403 ("example.sh.job") has been submitted

Monitoring your job

You can monitor the status of your job with qstat:

$ qstat

job-ID  prior   name       user         state submit/start at     queue                          slots ja-task-ID
-----------------------------------------------------------------------------------------------------------------
    403 0.00000 example mustermann      qw    07/18/2014 13:51:09                                    8

The letters of 'state' are:

• r – running
• w – waiting
• t – transfering to the cluster nodes
• E – Error
• h – hold
• s/S – suspended
• q – in queue (qw is waiting in queue until enough resources are available)

Deleting a Job

If you want to cancel a already started with qsub or delete a job witch had an error use qdel with the id shown in qstat:

$ qdel <job_id>

If an error occurs

You can get more information about a job including the error message by

$ qstat -j <job_id>