Re: [Condor-users] DedicatedScheduler hogging resources

[Greg Thain <gthain@xxxxxxxxxxx>]

Rok Roskar wrote:
> I'm running MPI under condor 6.6:
>
> DedicatedScheduler holds on to resources even after all MPI jobs have been
> removed from the queue - any way to fix this? Or is it an unfortunate
> byproduct of mixing parallel and serial jobs on the same set of resources?

It will hold onto claims for UNUSED_CLAIM_TIMEOUT seconds after the job 
leaves the queue, where UNUSED_CLAIM_TIMEOUT is a parameter in the 
condor_config file.  The default is 300 seconds, and you can lower this 
as you like.

> Also, my jobs sometimes try to start even when DedicatedScheduler doesn't
> have enough resources for them. This causes infinite looping of
> unsuccessful job execution, meaning that all the resource time gets
> wasted. For example, my job requests 8 machines, but only 7 are available.
> Somehow, Condor tries to execute the job anyway, but because there aren't
> enough resources, it doesn't run. Solutions?

Does the job try to start, or do the machines just get claimed?

-greg