[GE users] Help: Slots Problem

Lee Amy openlinuxsource at gmail.com
Sun Jan 6 11:49:24 GMT 2008


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2008/1/6, Ravi Chandra Nallan <Ravichandra.Nallan at sun.com>:
>
> Hi,
> refer to man qsub -pe option,
>           The range specification is a list of range  expressions
>           of the form "n-m", where n and m are positive, non-zero
>           integers.  The form "n" is equivalent  to  "n-n".   The
>           form  "-m"  is  equivalent  to "1-m".  The form "n-" is
>           equivalent to "n-infinity".  The range specification is
>           processed  as  follows:  The  largest  number of queues
>           requested is checked first. If  enough  queues  meeting
>           the  specified  attribute  list  are available, all are
>           allocated. If not, the next smaller number of queues is
>           checked, and so forth.
>
> In your case the cluster is able to serve a 8 slot pe job hence the job
> b gets 8 slots too.
> To notice the difference, try to make the cluster short of pe slots so
> that job 'b' would run even if it finds 6 or 7 or 8 slots, whereas for
> job 'a' 8 slots is a hard requirement.
> regards,
> ~Ravi
>
> openlinuxsource wrote:
> > Hello,
> >
> > I have a problem when I submit parallel job script.
> >
> > I use the following commands to submit scripts.
> > a. qsub -pe mpich 8 job.sh
> > b. qsub -pe mpich 6-8 job.sh
> > My PE is mpich, it's an tight integration. I find that when I use the
> > command qstat to show system information, a and b command will take
> > the same slots, 8 slots.
> >
> > So what's the difference between them? Why SGE will start the same
> slots?
> >
> > Thank you very much~
> >
> > Regards,
> >
> > Amy Lee
> > **
> >
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> Thank you very much. Quite clear~
Amy



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