Re: [Condor-users] Dagman & Job Priorities


Date: Wed, 9 Feb 2005 08:02:19 -0600
From: "Peter F. Couvares" <pfc@xxxxxxxxxxx>
Subject: Re: [Condor-users] Dagman & Job Priorities
Mark,

I believe Condor's 40-slot queue priority range was design to mimic the unix process priority range -- but I agree this can be constraining, and I'm not sure it makes sense anymore. I had already planned to look into whether it would be difficult to expand, or whether there are any good reasons not to... I'll let you know.

Thanks,

-Peter



On Feb 9, 2005, at 6:12 AM, SILBERSTEIN MARK wrote:

The problem with solution to add job priorities is a hard one, mainly due
to the fact that Condor has only 40 priority levels for jobs ( is there
any explanation why that??? ). If it was possible to put any
integer as a priority, this would definitely help, since then every DAG
and its jobs would get its own priority level, enforcing correct FIFO
order ( except for boundaries ). With only 40 priorities available one
should handle a watchdog to monitor and increase periodically
priorities of all the jobs in the DAG, after all jobs of another DAG
finished ( i.e. say you have 3 dags running dag A - prio 1, dag B - prio2,
dag C prio 3. when dag A completes, you move dag B to prio 1, and dag C to
prio 2 ). This is not trivial at all.



--
Peter Couvares                        University of Wisconsin-Madison
Condor Project Research               Department of Computer Sciences
pfc@xxxxxxxxxxx                       1210 W. Dayton St. Rm #4241
(608) 265-8936                        Madison, WI 53706-1685


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