Re: [Condor-users] How good are user priorities obeyed?

[David Anderson <mr.anderson.neo@xxxxxxxxx>]

I believe CLAIM_WORKLIFE configuration will control that.    It limits how long a claim can be kept active.   If the claim worklife expires them condor goes through another negotiation cycle to decide who gets the claim.    I generally set it to around 15-30 minutes and it seems to work well.   So for 15-30 minutes there can be as many jobs run by a particular user as they want with their claims but after that time when their job finishes a negiotiation for that slot will come up and based on their priority they might win it back or they might loose it.

We didnt have malicious problems with that but we had multiple groups of researchers using a dedicated cluster that were constantly submitting jobs during deadlines and whichever one got there first ended up having their jobs run while others jobs starved and the CLAIM_WORKLIFE setting really fixed that problem well.   The default if it isnt defined is infinate.

David

On Wed, Feb 25, 2009 at 9:20 AM, Carsten Aulbert <carsten.aulbert@xxxxxxxxxx> wrote:

Hi all,

a brief question which were answered in the past but I wanted to confirm
if the old answers are still valid for 7.2.x (or my understanding of the
old answers are wrong ;)):

On our cluster we currently have two users competing for resources.
User A has an effective prio of 13,802.65 and user B of 120,333.95.
Assume we had 1000 slots which are currently occupied 500:500 by these
two users and both have idle jobs in the queue.

In the past I believe it was true (and current observation seems to
support this) that the user priority does not have much of an influence
since user B is still getting jobs onto the cluster at roughly the rate
as her jobs finishes. Is that (still) the expected behavior?

What could we do about a users submitting dummy jobs to keep his/her
share of the cluster until the production codes are ready? Please assume
that we cannot use eviction since we have a nice mix of vanilla and
standard universe users.

Thanks for insights

Cheers

Carsten
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-- 
David Anderson
mr.anderson.neo@xxxxxxxxxxxxxxxx