[GE users] Advance reservation strange behavior

Jean-Paul Minet minet at cism.ucl.ac.be
Mon Jun 12 15:42:20 BST 2006


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>   Hi Jean-Paul,
> 
>     When you submit this jobs do you set the option "-R y" ?

Yes, I did.  A "qstat -j job_id" shows that SGE picked up correctly this option.

jp

>                                                   Regards
> 
> On Mon, 12 Jun 2006 16:19:14 +0200
> Jean-Paul Minet <minet at cism.ucl.ac.be> wrote:
> 
> 
>>Craig,
>>
>>[...]
>>
>>
>>>>Submitting a job with advanced reservation (test_ar), it doesn't get 
>>>>allocated any priority (tickets only, based on fair share only):
>>>>
>>>>job-ID  prior   nurg    npprior ntckts   ppri name       user         
>>>>state submit/start at     queue                          slots ja-task-ID
>>>>---------------------------------------------------------------------------- 
>>>>
>>>>[...]
>>>> 13149 0.00000 0.00000 0.00000 0.00000     0 test_ar    root         
>>>>qw 06/08/2006 11:46:48                                   20
>>>>
>>>>If I then submit the same job but without advanced reservation (test), 
>>>>it gets its normal priority, while the advanced reservation job 
>>>>remains at 0 priority.
>>
>>[...]
>>
>>
>>>SGE does not support the gathering of resources prior to runtime to
>>>ensure that the code runs at the time requested (advanced reservations).
>>>It does support the running of code at a requested time, and if at that
>>>time the job does not have enough resources it will aggressively gather 
>>>those resources until it can run (reservations).
>>
>>Sorry, I probably misexpressed myself...  I was talking about "resource 
>>reservation", i.e. preventing lower priority small (in terms of slots) jobs to 
>>run before jobs requiring a higher number of slots.  It is not a question of 
>>specific time for the job to run, but to respect priority order, keeping CPUs 
>>aside as soon as they get free to gather enough of them to enable a big job to 
>>run (instead of dispatching small jobs).
>>
>>I am wrong somewhere?
>>
>>Jean-Paul
>>
>>
>>>What time was the job scheduled to run?  I thought that the priority
>>>for jobs with reservations stays zero until after the start time has 
>>>passed.
>>>
>>>Craig
>>>
>>>
>>>
>>>
>>>>Thanks for any info/help
>>>>
>>>>Jean-paul
>>>>
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>>>
>>
>>-- 
>>Jean-Paul Minet
>>Gestionnaire CISM - Institut de Calcul Intensif et de Stockage de Masse
>>Université Catholique de Louvain
>>Tel: (32) (0)10.47.35.67 - Fax: (32) (0)10.47.34.52
>>
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> 
> 
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-- 
Jean-Paul Minet
Gestionnaire CISM - Institut de Calcul Intensif et de Stockage de Masse
Université Catholique de Louvain
Tel: (32) (0)10.47.35.67 - Fax: (32) (0)10.47.34.52

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