[GE users] Advance reservation strange behavior

Brady Catherman bradyc at uidaho.edu
Tue Jun 27 18:03:24 BST 2006


I had mine set at 1000:0:0 and t was still failing to schedule  
parallel jobs. I have tried both high and low values with no luck.  
Any advice?


On Jun 27, 2006, at 9:06 AM, Reuti wrote:

> Hi,
>
> Am 27.06.2006 um 15:05 schrieb Sili (wesley) Huang:
>
>> Hi Reuti,
>>
>>
>>
>> In our cluster, we don't specify h_rt, so there is not backfill  
>> jobs and all slots were filled out during the time I found the  
>> problem. I guess the problem
> if reservation is enabled, the default_duration will be taken for  
> jobs, which don't specify any {h,s}_rt; if this is set to a low  
> values like the default 10 minutes, jobs may start as SGE thinks  
> they will end before any other running job.
>
> -- Reuti
>
>
>> is related to that SGE reserves certain nodes for a reservation  
>> and even if there is any other nodes are released in the mean  
>> time, SGE does not pick up these free slots.
>>
>>
>>
>> Reuti> is there any other job running in the system which blocks  
>> the 16-CPU
>>
>> Reuti> job, and what you see is just the backfilling of empty  
>> slots in the
>>
>> Reuti> meantime, until the one blocking job ends?
>>
>>
>>
>> Best regards,
>>
>> Sili(wesley) Huang
>>
>>
>>
>> --
>>
>> mailto:shuang at unb.ca
>>
>> Scientific Computing Support
>>
>> Advanced Computational Research Laboratory
>>
>> University of New Brunswick
>>
>> Tel(office):  (506) 452-6348
>>
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