Use PBS batch control system whenever it is possible. If you're not
familiar with PBS - please consider learning it, because it will make
your use of the cluster more efficient and it will help to advocate
fair use of the cluster among the users. ravanize command might be of help to get things running Basic PBS commands-
qsub — to schedule a command to be ran. If you are not familiar with PBS, simply make use of ravanize to generate and run .pbs script for you. -
qstat (qstat -f provides more information) - to see the status on the tasks scheduled within PBS -
qdel — to delete your scheduled/running task -
pbsnodes — know details about the nodes within PBS (of marginal use for a regular user)
QueuesThere
are different pbs queues set up, and you should use the one which fits
your time requirements. You can mention default queue so pbs chooses
the queue for you depending on the time requirement you provided in
your pbs file:
- small - up to 25 minutes (nice level 2)
- medium - up to 6 hours (nice level 4)
- long - up to 24 hours (nice level 6)
- verylong - up to 528 hours (nice level 7)
-
directors - up to 4 hours of cpu time and 1000 hours of walltime (nice
level 5): queue is intended for scripts which can span other PBS jobs
and sleep waiting for their compition
- default - will schedule your task to one of the queues depending on the time limit you requested
Rules- Time:
Try to make sure that you have selected an appropriate queue since if
your task does not complete in the allowed time slot, it gets killed.
If you see that your job is going to exceed the original time you
requested (ie for a specific queue) and it had been running already
quite long time (ie it was scheduled for long or verylong queue) — email SysAdmin to request the extension of allowed time
- Memory: request sensible amount of RAM for your job to complete (
-l mem=2GB option for ravanize or qsub command)
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