Re: [Condor-users] Getting certain jobs to avoid eachother

[Nathan Panike <nwp@xxxxxxxxxxx>]

On Mon, Dec 12, 2011 at 05:49:34PM +0000, Martin Steele wrote:
> Hi,
> 
> I have a class of jobs that I'd like to ensure is maximally dispersed amongst
> my pool's resources. What marks these jobs out from others is that they
> require a lot of memory, but let's consider the generic problem of having a
> particular class of jobs avoiding eachother. Firstly, I'll get these jobs to
> identify themselves by setting a custom classad value in their submit script,
> e.g. via:
> 
> +AntisocialJob = True

How about adding the expression

TARGET.SlotID == 1 

to your Requirements expression? Then at most one "antisocial" job would run on
a given machine at a single time.

Nathan Panike

> 
> I now need a NEGOTIATOR_POST_JOB_RANK expression on the execute hosts that
> gets smaller (or goes negative?) the more of these jobs that are running on a
> particular host. The problem is that I can't see how to construct such an
> expression. Is there a way I can define a macro on each execute host that
> keeps track of how many such jobs are executing on it, say
> Num_AntisocialJobs? I could then have an expression of the form:
> 
> NEGOTIATOR_POST_JOB_RANK = NUM_SLOTS- Num_AntisocialJobs
> 
> Thanks for any helpful pointers,
> Martin

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