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

Reuti reuti at staff.uni-marburg.de
Mon Jan 31 18:54:33 GMT 2005


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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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