Re: [Condor-users] Job attribute based preemption

[Horvátth Szabolcs <szabolcs@xxxxxxxxxxxxx>]

So if I can make sure that there is significant different between the 
rank of the currently running and the preempting
job's rank than I can - although indirectly - guess the type of my job 
without knowing the actual classad values.
And these values (PreemptingRank and CurrentRank) can be queried in a 
MaxJobRetirementTime expression.
Is it correct?

Cheers,
Szabolcs


> Ah.  You want the machine to provide a long retirement time except when 
> the job is being preempted by certain other types of jobs?  There is 
> currently no way to look at arbitrary attributes of the preempting job 
> from the MaxJobRetirementTime expression.  However, you can compare 
> PreemptingRank and CurrentRank or PreemptingOwner and Owner.  Example:
>
> MaxJobRetirementTime = (...) * (isUndefined(PreemptingRank) || 
> PreemptingRank <= CurrentRank)
>
> I haven't tested that, but I think that should set MaxJobRetirementTime 
> to 0 if PreemptingRank is greater than CurrentRank.  You could be more 
> specific in which types of jobs are allowed to be quickly preempted, 
> but, since you can't access attributes of the preempting job, you can't 
> be more specific in terms of which type of job is allowed to quickly 
> preempt, other than, as I mentioned before, not letting them pass 
> through the START expression in the first place.
>