Re: [Condor-users] override user rank expression

[Michael Di Domenico <mdidomenico4@xxxxxxxxx>]

Thanks Ian, that's what I was thinking, but i wasn't overly happy with
using a wrapper script.  I'd prefer a cleaner method using classads.

I'll play around with the NEGOTIATOR_PRE_JOB_ RANK, i was a little
leary over using those as it seems like it will resort the lists of
matching hosts using by including the user supplied rank expression
(but only in the event of a tie), so while it seems close to what i
want, i'm not sure it allows me to completely supersede the user
supplied rank expression


On Tue, Jul 5, 2011 at 10:27 AM, Ian Chesal <ichesal@xxxxxxxxxxxxxxxxxx> wrote:
> On Tuesday, July 5, 2011 at 9:48 AM, Ian Chesal wrote:
>
> On Friday, July 1, 2011 at 7:43 PM, Michael Di Domenico wrote:
>
> Is there a mechanism in Condor that would allow condor to ignore a
> rank expression in a users submit file? I'd like to enforce that
> every condor submit gets RANK=Target.Rank and ignores anything a user
> might have submitted in his file
>
> Unfortunately, no. There's an APPEND_RANK and DEFAULT_RANK setting -- the
> former appends to an existing RANK statement in a submission and the latter
> sets a default RANK if there isn't one in the submission. But there's
> nothing that lets you replace RANK outright.
> This is a good case for submission wrappers: a layer of code between your
> users and Condor that you control. They give you the ability to control
> site-wide policies a little better when Condor doesn't the necessary
> mechanisms to enforce things for you. For example, in CycleServer we have
> the concept of "submission rules" that can be set for a site. These rules
> override anything a user might put in their submission file so site
> administrators can force things like a specific RANK statement on to every
> job.
>
> I should answer questions before my morning coffee has kicked in. :)
> Yes, you can do this! NEGOTIATOR_PRE_JOB_RANK is what you want to use. Jobs
> are sorted by this attribute before they are sorted by the user's RANK
> expression in their job ad.
> In your case:
> NEGOTIATOR_PRE_JOB_ RANK = Rank
> You may want to consider a way to keep the default RemoteOwner =?= UNDEFINED
> in that expression -- so that your jobs prefer unoccupied slots first.
> Manual page is
> here: http://www.cs.wisc.edu/condor/manual/v7.4/3_3Configuration.html#18503
> Regards,
> - Ian
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