[torqueusers] Submission number limits?

Steve Traylen steve.traylen at cern.ch
Wed May 7 14:29:57 MDT 2008


2008/5/7 Garrick Staples <garrick at usc.edu>:
> On Wed, May 07, 2008 at 02:53:04PM -0500, Jeremy Mann alleged:
>
> > Good afternoon all, I have one user that wants to submit roughly 140,000
>  > jobs to our queue. We tried it last week and it never worked. It took
>  > nearly an hour to submit all of them, then the PBS scheduler would stop
>  > responding and give:
>  >
>  > 05/02/2008 14:39:50;0100; pbs_sched;Req;;Leaving schedule
>  >
>  > 05/02/2008 14:39:50;0080; pbs_sched;Svr;main;brk point 760373248
>  > 05/02/2008 14:39:53;0100; pbs_sched;Req;;Entering Schedule
>  > 05/02/2008 14:42:53;0002; pbs_sched;Svr;toolong;alarm call
>  >
>  > The jobs are quite small and they run for about a minute. Now we're
>  > thinking about breaking them up into 100 or 1000 job chunks.
>  >
>  > I'm curious if the number of jobs being submitted, in our case 140,000, is
>  > too large for PBS/Torque to handle.
>  >
>  > Torque 2.1.2 x86_64 and the built in scheduler (not MAUI)
>
>  The trick is to limit the number of jobs visible to the scheduler by using a
>  routing queue to spool jobs into the execution queue.
>
>  So you do something like this:
>
>  create queue spoolq queue_type = Route, route_destinations = execq
>  create queue execq  queue_type = E, max_queueable=1000
>

Would at a MAUI level

USERCFG[DEFAULT]    MAXIJOB=100

do the same thing and allow other users a look in while big user is having his
submitted in batches of 100.

 Steve


>  Submit jobs to spoolq and it should handlelarge numbers of jobs.
>
>  --
>  Garrick Staples, GNU/Linux HPCC SysAdmin
>  University of Southern California
>
>  Please avoid sending me Word or PowerPoint attachments.
>  See http://www.gnu.org/philosophy/no-word-attachments.html
>
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>



-- 
Steve Traylen


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