[GE users] Configure the number of simultaneous jobs in a queue

Rayson Ho rayrayson at gmail.com
Mon May 7 02:34:23 BST 2007


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Yes, you can use "slots" to control the number of running jobs in a queue.

Are you sure there are more *running* jobs than the number of
available slots?? What did you find when you ran qstat when there are
more than 64 jobs submitted??

Rayson


On 5/6/07, Neil Killeen <nkilleen at unimelb.edu.au> wrote:
> Hi
>
> I have version  6.0u10 (default installation) operating on an Altix
> multi-processor (N=64)   machine.
>
> I have one queue.  I want to configure that queue to set the maximum
> number of
> simultaneous jobs the queue will run (independent of users and
> scheduling).
>
> Using the QMON GUI I click on 'Queue Control',  and select the
> 'CLuser Queue'
> TAB.  This shows my one queue (all.q) with columns 'AVAIL=64' and
> 'TOTAL=64'
> I suspect the 64s came from the install script finding out how many
> CPUs the
> system has (64).
>
> I select my one CLuster Queue and then click 'modify'.  Selecting the
> 'General Configuration' TAB  I see
> a property called 'Slots'  It has the value 1.  The manual suggests
> this is the property I want.
>
> However, I find that I can run an infinite number of simultaneous
> jobs on my queue (just by submitting with 'qsub').   CHanging the
> 'Slots' parameter
> has no impact on this.
>
>
> 1. What exactly are the Cluster queue columns 'AVail' and 'Total' and
> how were they populated ?
> 2. What is slots exactly ?
> 3. How do I constrain the number of simultaneous jobs on my queue to N ?
> 4. If 'slots' is the answer, why did it have no effect when I changed
> it ?
>
>
> I have looked at the FAQs, HowTos and Manuals without finding the
> answer (if it's not slots)
>
>
>
> many thanks
> Neil
>
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