[GE users] scheduler priority questions

Reuti reuti at staff.uni-marburg.de
Sat May 12 10:19:26 BST 2007


Am 10.05.2007 um 17:55 schrieb Mike Packard:

> Thank for the help Reuti.
>
>> did you enable resource reservation, i.e. submitted the jobs with "-R
>> y" and the scheduler setting like "max_reservation 64"?
>
> How can I show the existing reservation schedule?
>
>> The specified h_rt will be used for backfilling of already reserved
>> resources, and should be set to a sensible value. If left out, the
>> "default_duration" from the scheduler configuration will be used.
>> Unfortunately there is no "suggested runtime" without enforcing the
>> hardlimit h_rt for now.
>
> h_rt would be difficult for me to set because I have some jobs that  
> run for over
> a month and some that last only a few minutes.   I fear I would  
> have to set it
> too high for SGE to be able to make a useful schedule.
>
>> Maybe a dedicated queue for only this user (set user_lists) and the
>> necessity to request a complex (i.e. FORCED) to use it which has a
>> high urgency value.
>
> How does one prevent multiple jobs from running on a single node if  
> that node is
> in more than one queue?

You can define "slots=<no. of cpus>" in each exec host's definition  
(qconf -me <host>).

> BTW, If I set maxujobs to 1 while one user has several jobs already  
> running, will sge
> suspend them?  Is there a way to disable job suspension  
> altogether?  I never
> want this to happen.

Just try ;-)

But I wonder: there is no default for job suspension, so there is  
nothing to disable.

-- Reuti

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