RE: [condor-users] pre-emption disabling without machine locking

["Matt Hope" <Matt.Hope@xxxxxxxx>]

Dan Bradley wrote:
>
>>
>> Matt Hope wrote:
>>
>>> Is there anyway to force a machine to become unclaimed when jobs 
>>> finish? would this significantly affect throughput when the farm has 
>>> only one user with many jobs?
>>>
>>
>> There is no way to do this, but the feature you want will be in 6.7.x 
>> (probably 6.7.1).  Your solution which allows preemption during the 
>> early stages of a job is the best workaround that I know about.  
>> Unfortunately, you don't want to do that for a certain class of 
>> "critical" jobs, so those will be problematic.
>>
>
>I should mention an additional clever but expensive workaround that some >people came up for preventing critical jobs from being killed while 
>still allowing preemption to happen: they set PREEMPTION_REQUIREMENTS to >allow preemption during the first 10 minutes of execution and they make >their job sleep for 10 minutes (plus a few for safety) on startup.


Thank you - I await 6.7.1 with interest. To mitigate the effect of preemption I try to tune the jobs to last an hour or two, 10 mins of downtime is too high a throughput loss, I'll wait.

Cheers,
Matt


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