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Subject: Re: [OMPI users] restricting a job to a set of hosts
From: Reuti (reuti_at_[hidden])
Date: 2012-07-26 17:48:43


Am 26.07.2012 um 23:33 schrieb Erik Nelson:

> I have a purely parallel job that runs ~100 processes. Each process has ~identical
> overhead so the speed of the program is dominated by the slowest processor.
>
> For this reason, I would like to restrict the job to a specific set of identical (fast)
> processors on our cluster.
>
> I read the FAQ on -hosts and -hostfile, but it is still unclear to me what affect these
> directives will have in a queuing environment.
>
> Currently, I submit the job using the "qsub" command in the "sge" environment as :
>
> qsub -pe mpich 101 jobfile.job
>
> where jobfile contains the command
>
> mpirun -np 101 -nolocal ./executable

I would leave -nolocal out here.

$ qsub -l "h=compute-5-[1-9]|compute-5-1[0-9]|compute-5-2[0-9]|compute-5-3[0-2]" -pe mpich 101 jobfile.job

-- Reuti

> I would like to restrict the job to nodes compute-5-1 to compute-5-32 on our machine,
> each containing 8 cpu's (slots). How do I go about this?
>
> Thanks, Erik
>
> --
> Erik Nelson
>
> Howard Hughes Medical Institute
> 6001 Forest Park Blvd., Room ND10.124
> Dallas, Texas 75235-9050
>
> p : 214 645 5981
> f : 214 645 5948
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