[Beowulf] PBS/Maui delay starting of several jobs for certain user

Hearns, John john.hearns at mclaren.com
Fri Jul 2 11:30:29 EDT 2010


> Hi all,
> we have a user with jobs that create heavy I/O load on our network
file
> system every x minutes. If I block her jobs and start them manually
> with
> a delay of about 10 minutes, she can run about 60 jobs simultaneously.
> However, if I don't do that and the jobs are started at more or less
> the
> same time (for example after a big job from another user finished),
she
> can run about 30 jobs without stressing our file system so hard that
> "ls" takes 30 seconds to display any home directory.

Nico,
  I have the perfect tool for this job:
http://www.bofhcam.org/co-larters/lart-reference/


I did have a quick look in the PBSpro admin manual - I can't see
anything at first glance
which limits number of jobs per scheduler cycle. I could very well be
wrong.
You can increase the intervals between scheduler runs - but that will
not do exactly what you want.

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