Theory Computing Environment

Theory Computing Environment

Batch System

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The Batch System DQS

On the GSI Theory LinuxCluster the queuing system DQS is used for batch jobs.

Up to now we provide no special queues for short, long, small or big jobs. Until we run into problems this strategy will not be changed.

If you submit a job it will be started on the fastest machine with the lowest load. On each machine one, two or three jobs can run simultaneously -- depending on the number of processors. Jobs are running with nicelevel 15 so that the machine's owner will slightly notice the background jobs in his interactive use.

Submitting a job

To use the DQS batch system you must prepare your job in form of a script. A script example.dqs should look like

#!/bin/sh
# 
# example script for submitting a job to the Theory Linux cluster
#
#$ -cwd
#$ -N universe
#$ -m b 
#$ -m e
#$ -j y
#$ -o universe.log
#
calceverything -answer 42

To submit the job use the qsub command:

qsub example.dqs

Some options of qsub

`-cwd`	change to current working directory
`-N name`	give your job a name (recommended)
`-m e`	mail at end of job
`-m a`	mail if job aborts (recommended)
`-j y`	join standard output and standard error
`-o FILE`	filename for standard output
`-e FILE`	filename for standard error
`-l mem.ge.1024`	submit only to machines with at least 1GB RAM
`-l mem.ge.4096`	submit only to machines with at least 4GB RAM

For the full list read the man page man qsub.

Checking the Queue

You can check the status of your jobs with the qstat command. If you want more information use

qstat -f

Deleting a job

Get the job-id with qstat and delete the job with

qdel job-id

Last modified: January 21, 2004 Thomas Neff