[Mauiusers] blocked jobs never run
roy.dragseth at cc.uit.no
Thu Nov 25 01:37:28 MST 2010
On Thursday, November 25, 2010 09:33:16 Roy Dragseth wrote:
> On Thursday, November 25, 2010 02:26:57 William G Wichser wrote:
> > They are given higher priorirty but because of the fact that they cannot
> > fit, they go into mthe blocked state and never get scheduled. I given
> > wide jobs much higher weights. But again, because there are not enough
> > nodes ever available at one time, they sit blocked with less wide jobs
> > keep getting scheduled due only to available cores.
> With blocked, do you mean that they are in Idle state or Deferred state?
> I assume your jobs are Idle, that is, do the largest jobs stay on the top
> of the list when you do showq -i. (If not, you have set some throttling
> policies in maui that prevent them from becoming eligible for scheduling.)
> Have you set the RESERVATIONDEPTH in maui.cfg?
> We have set
> RESERVATIONDEPTH 3
> BACKFILLPOLICY FIRSTFIT
> RESERVATIONPOLICY CURRENTHIGHEST
> to make the three jobs with highest priority set reservations on nodes so
> they can build up resources over time until they are able to start.
> Backfill makes it possible to fill in shorter jobs while the big jobs are
> waiting to start.
Another small thing:
If your highest priority jobs have reservations their job-id will have a *
attached when you do showq -i.
The Computer Center, University of Tromsø, N-9037 TROMSØ Norway.
phone:+47 77 64 41 07, fax:+47 77 64 41 00
Roy Dragseth, Team Leader, High Performance Computing
Direct call: +47 77 64 62 56. email: roy.dragseth at uit.no
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