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Re: [Condor-users] Blocking Resources



Is it possible to do the following using condor?


Block a few machines;

Use them for some jobs, say MPI jobs;

Release a subset (or) acquire more machines

Use them for some more jobs

Iterate like this before finally relinquishing all resources…


Can such a thing be possible with Condor?

You can do something pretty close to this with the parallel universe.

See the manual section "Condor's Dedicated Scheduling"


for details on how to set this up.  The biggest difference from your request is that you can't release
a subset, you must release all of the machines allocated to your parallel job at once.  However, the
machines stay claimed by the schedd for a while, so if you release the machine, then request more within
a short time frame, the request should be serviced quickly.