[torqueusers] Submission number limits?

James J Coyle jjc at iastate.edu
Wed May 7 14:32:58 MDT 2008


Garrick,

  Syntax correction:

create queue execq  queue_type = E, max_queuable=1000

(No between queu  and able  )

  Thanks for the heads up about this, I needed it too.


-- 
 James Coyle, PhD
 SGI Origin, Alpha, Xeon and Opteron Cluster Manager
 High Performance Computing Group     
 235 Durham Center            
 Iowa State Univ.          
 Ames, Iowa 50011           

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> 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:
> >=20
> > 05/02/2008 14:39:50;0100; pbs_sched;Req;;Leaving schedule
> >=20
> > 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
> >=20
> > 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.
> >=20
> > I'm curious if the number of jobs being submitted, in our case 140,000, is
> > too large for PBS/Torque to handle.
> >=20
> > 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 =3D Route, route_destinations =3D execq
> create queue execq  queue_type =3D E, max_queueable=3D1000
> 
> Submit jobs to spoolq and it should handlelarge numbers of jobs.
> 
> --=20
> 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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