[GE users] SGE-5.3: subordinate-queues and limited slots

Erik Soyez soyez at science-computing.de
Tue Feb 1 07:16:32 GMT 2005


Good Morning Reuti,

thanks heaps, that works - if I had been using the GUI, I most likely
wouldn't have missed that Option....  reading "man queue_conf" helped
though.

:-)Erik.


On Mon, 31 Jan 2005, Reuti wrote:

> Hi,
>
> Quoting Erik Soyez <soyez at science-computing.de>:
>
> >
> > Hi, I have encountered a problem which may not be new, but I could not
> > find a solution.
> >
> > I have exechosts with 2 processors each and two queues each.
> > queue "long" is subordinate to queue "express".  Each queue has got 2
> > slots and on each exechost the number of slots is limited to 2 as well.
> >
> > A job running in queue "long" is supposed to be suspended by "express"
> > Jobs.  But as the "long"-queue is already using all of the host-slots, no
> > "express"-job gets scheduled on hosts where "long"-jobs are running.
> >
> > If I set the number of slots per exechost to 4, "express"-jobs do get
> > scheduled and do suspend "long"-jobs, but only if the "express"-queue is
> > "full".  If I only submit a 1-slot job I end up running 3 slots (1
> > express and 2 long) on a node with only 2 processors.
>
> to what value did you set the number of slots in the subordinate definition? If
> you put there a 1, you should get the desired behavior. If you let it
> undefined, then all slots have to be filled to suspend the queue - maybe this
> is what you observed.
>
> Cheers - Reuti
>
> >
> > Hmm, not well explained though.  What I want is clear:
> >
> > No more than 2 slots on each host and any "express"-job is supposed to
> > suspend "long"-jobs, i.e. a 1-slot-"express"-job is supposed to suspend a
> > 2-slot-"long"-job.
> >
> > Any idea?
> >
> > Thanks!!
> >
> > :-)Erik.
> >
> > --

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