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Re: [HTCondor-users] Perform condor_q, condor_status selections on Requirements

Hi Max,

Iâm not sure I completely understand your email.  Are you asking if thereâs a way to filter a set of ClassAds based on whether thereâs a symmetric match with a given ad instead of a constraint?

If so, I think the silly script below might help.  *NOTE* the python bindings are a bit more restrictive on scoping than condor_q.  So, if you replace the job requirements below with:

Requirements = SlotID =?= 1;

(no explicit TARGET), it wonât work.

If you donât want a symmetric match, you can do:


to determine whether the job ClassAd matches machineâs REQUIREMENTS expression.  Of course,


is equivalent to:

job.symmetricMatch(machine) && machine.symmetricMatch(job)


import classad
import htcondor

job = classad.ClassAd("""
   RequestMemory = 500;
   RequestCPUs = 3;
   RequestDisk = 1;
   Requirements = TARGET.SlotID =?= 1;
coll = htcondor.Collector()

for machine in coll.query(htcondor.AdTypes.Startd):
    if job.symmetricMatch(machine):
        print machine["Name"]

> On Jul 31, 2015, at 9:49 AM, Fischer, Max (SCC) <max.fischer@xxxxxxx> wrote:
> Hi all,
> we are currently trying to select jobs and startds from condor_q and condor_status for monitoring purposes. The problem is that our criteria mostly work with REQUIREMENT and RANK attributes of the ClassAds which cannot be used with -constraint.
> My guess is that is due to them requiring a TARGET for evaluation.
> Our solution so far is to do grepâs and similar on the output of condor_q and condor_status with the -format option. This however seems inefficient and prone to failure when users get creative (e.g. when using intricate regexp for machine selection).
> Is there a way to apply condor_q/condor_status -constraint to ClassAd attributes requiring a TARGET? Can we perhaps actually supply a TARGET ClassAd for the evaluation? Is this possible with the python bindings perhaps?
> Cheers,
> Max
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