[GE users] Normal and LAM/MPI jobs : concurents jobs

Reuti reuti at staff.uni-marburg.de
Sat Mar 4 01:33:47 GMT 2006


Hi,

Am 04.03.2006 um 01:55 schrieb christophe.caron at jouy.inra.fr:

>
> Hello
>
> I run sge 6.0 update 6 and LAM 7.1.1
>
> I've configured SGE / LAM with tight integration
> (http://gridengine.sunsource.net/howto/lam-integration/lam- 
> integration.htm)
>
> I use a basic fair share policy : each user has the same weight.
>
> My configuration works.
>
> I've only one problem :
>
>  Cluster is full with non lam jobs and the queue is full with the
> same user (ex : 20 jobs in qw )
>  Another user submit a MPI jobs which need 2 CPU
>  The job is in qw mode but it is in the first of the queue (fair  
> share is ok)
>  But when a slot will be free, the MPI job will not run because it  
> needs 2 CPU ! And the cluster will be full by one of the 20 normal  
> job.
>
> Is there any clue to find a policy to solve this problem with only  
> one queue configuration ?
>

you have to turn on reservation in the scheduler (man sched_conf) by  
setting max_reservation to something higher than zero (maybe around  
20), and submit the parallel jobs with "-R y".

HTH - Reuti


> thanks
>
> cc
>
>
> Prenez note de ma nouvelle adresse : christophe.caron at jouy.inra.fr
>
> ***********************************************************
>  Christophe Caron - INRA
>  Mathematique, Informatique et Genome
>  Domaine de Vilvert 78350 Jouy-en-Josas
>  Web: http://migale.jouy.inra.fr/
>  Tel: 01-34-65-28-88  Email: christophe.caron at jouy.inra.fr  
> ***********************************************************
>
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