[GE users] (another) slotwise preemption question

spow_ miomax_ at hotmail.com
Fri Aug 27 09:51:50 BST 2010

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reuti a écrit :
> <snip>
>> So, question is, why is SGE trying to push a 5th job onto
>> a machine that has only 4 slots, and all 4 are "busy" ? And, is
>> there a way around this ?
> What about using a checkpointing environment for the jobs in the secondary queue, where the suspension of the job will kill and requeue it (check-transparent will do already). You wouldn't need any special script like the one you used for the suspension right now.
Could you further explain this ? I am also using a co-scheduler to qmod -rj jobs
that have 'S' in their state which means their slots got preempted, and I am
also concerned with the example the PO adduced.
Does the check-transparent environment automatically requeue jobs that got
suspended ?
Can it be used _without_ any end-user code/script modification ? (just specify
parameters in SGE)

> Well, although the black hole is gone this way, one job is oscillating all the time when a checkpointing environment is used between "SR" and "Rq" states (with the schedule_interval period).

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