Re: [Condor-users] On-demand priority access to resources

["David A. Kotz" <dkotz@xxxxxxxxxxxxx>]

If you search the archives on my last name, Kotz, you'll find a
long-running thread only wrapped up last month, I believe, which
discusses how I customized my Condor install to allow different users to
have different priorities.  You could use the same sort of technique to
accomplish the very high priority jobs you've discussed.

Basically, you define a custom variable in your submit description like:

+RunMeNow

and set your machine RANK statement to strongly favor that in its
ranking.

- dave



On Tue, 2004-08-03 at 09:37 -0700, Ian Chesal wrote:
> A colleague asked a similar question without any answers, so I thought
> I'd try rephrasing things.
> 
> We are wondering how, in the Condor world, the following scenario is
> handled:
> 
> I have lots of users and lots of machines in the Condor pool. All users
> run vanilla jobs of varying length, between 1-10 hours  of comuptation
> time long. User A suddenly has a very, very important experiment that
> must take priority over all the other jobs in the system. How do you let
> User A trump all other jobs? Based on Condor's manual and the
> description of the decaying user priority it would seem that User A
> would have "save up" system time by not submitting jobs for a few days
> and letting their user priority reset to the highest value.
> 
> What if waiting for the user priority to reset wasn't an option? How
> does User A gain full access to all the resources and trump everyone
> else? Do the condor admins have to intervene to broker this type of
> priority access or can User A do something to indicate this one
> experiment is the top priority regardless of user priorities?
> 
> Any insight into how Condor behaves, or how others manage large Condor
> installations with a large user base, would be greatly appreciated.
> 
> Ian
> 
> --
> Ian R. Chesal <ichesal@xxxxxxxxxx>
> Senior Software Engineer
> 
> Altera Corporation
> Toronto Technology Center
> Tel: (416) 926-8300
> 
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-- 
David A. Kotz <dkotz@xxxxxxxxxxxxx>