[condor-users] Questions about resource allocation and user priorites...

["Michael S. Root" <mike@xxxxxxxxxxxxxx>]

Hi.  I've been running Condor 6.6.0 for a couple of months now, and I'm 
curious about how to more effectively control resource allocation among 
users.

If a user submits a dagman job, it will be correctly distributed across our 
machines (cuurenly 11 of them).  However, if a second user then also 
submits a dagman job, that user will not get ANY resources until all of 
the first users jobs have been completed.  Both of the users have the same 
priority factor (1.0).  The second user has an Effective Priority of 0.5, 
while the first user's Effecive Priority is 11.0 (or 1.0 times the number 
of machines).  Why don't any of the machines get allocated to the other 
user over time as some of the jobs in the first user's dag finish?

As an experiment, I've set the PRIORITY_HALFLIFE to just 5 seconds, so a 
user's Real Priority reflects only the resources they are currently using 
(more or less).  This doesn't seem to have affected the behavior in the 
slightest.

I also tried fiddling with some of the PREEMPTION values.  However, this 
isn't really what we want.  All of our jobs are in the Vanilla universe, 
so we definitely do NOT want to just kill jobs that have run for a while.  
We don't really want the instant resources that PREEMPTION provides, just 
to have the resources equalize across users over time as jobs finish.

Any idea what I'm missing here?  Thanks for any insight you can provide.

-Mike
mike@xxxxxxxxxxxxxx

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