[GE users] Batch jobs claiming unused cycles in a mainly interactive job cluster?

Ben Singer bdsinger at Princeton.EDU
Thu Mar 17 04:03:23 GMT 2005


Thanks Reuti, I'll test this out and see how it goes. I'm wondering 
about what the effect of moving the priorities closer together will be.

On Mar 16, 2005, at 5:09 PM, Reuti wrote:

> Hi,
>
> I'd suggest to give the batch queue a priority (i.e. nice value) of 19 
> and
> leave the interactive queue at 0. Maybe this is already nive enough for
> interactive work - just test it.
>
> Remember to set "reprioritize false" in the global config and the
> "reprioritize_interval 0:0:0" in schduler conf in case you use SGEEE 
> 5.3 or
> 6.0.
>
> Cu - Reuti
>
> Quoting Ben Singer <bdsinger at Princeton.EDU>:
>
>> Context:
>> Our head node's /etc/csh.login runs qrsh when users log in to our
>> 64-node Apple Xserve Dual-G5 cluster, routing users to available nodes
>> using the default 5.3 policy (2 slots/exec host). Users mostly run in
>> interactive mode, for days at a time, though we are gently educating
>> and encouraging batch submissions.
>>
>> Question lead-up:
>> I implement the relocation howto-- and have batch jobs run only when
>> interactive jobs are idle, but that seems inefficient. Better would be
>> to suspend the batch job only if the interactive job is sufficiently
>> busy. Using a suspend threshold based on total load will cause
>> resource-intensive batch jobs to suspend themselves.
>>
>> Actual Question:
>> Is there a way to suspend a queue based on the load of another queue?
>>
>>
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>
>
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