Sierra User Guide: Running Jobs
Sierra uses the TORQUE Resource Manager (also known by its historical name Portable Batch System (PBS)) with the Moab Workload Manager to define and manage job queues. TORQUE allows the user to submit one or more jobs for execution, using parameters specified in a job script. Users have options for runing in batch mode are:| Queue Name | Limits | Comments |
| normal/short | max wallclock = 24 hours | Used for short to normal length jobs. |
| long | max wallclock = 168 hours | Used for longer-running jobs. |
Batch Jobs
Example Script:
[user@sierra]$ cat script #!/bin/bash # the queue to be used. #PBS -q normal # number of nodes and number of processors per node requested #PBS -l nodes=8:ppn=8 # requested Wall-clock time. #PBS -l walltime=HH:MM:SS # name of the standard out file to be "output-file". #PBS -o job_output # name of the job #PBS -N MPI_JOB #PBS -V cd $PBS_O_WORKDIR #change to the working directory mpirun -np 256 -hostfile $PBS_NODEFILE <executable>
Submit the job via:
[user@sierra]$ qsub <batch_script>
Monitoring Batch Queues
Users can monitor batch queues using the qstat and showq commands. Common qstat options are as follows:
Command Description qstat -a Display the status of batch jobs qdel <pbs_jobid> Delete (cancel) a queued job qstat -r Show all running jobs on system qstat -f <pbs_jobid> Show detailed information of the specified job qstat -q Show all queues on system qstat -Q Show queues limits for all queues qstat -B Show quick information of the server pbsnodes -a Show node status
View the qstat manpage for more options.
