Re: [HTCondor-users] Limiting n. of jobs per user via matchmaking

[Dario Berzano <dario.berzano@xxxxxxx>]

Thank you for your answer. Using quotas would indeed be more appropriate: however, to my understanding, quotas only apply to groups, not users.

I have tried to create one group per user, and it works nicely: but my list of users is not "static" (i.e. they come from a remote LDAP server) and it is potentially very large. Maybe there are options that I am not aware of to get the GROUP_NAMES from some dynamic source, and to define a "default group quota" where not explicitly mentioned...

For the moment I am satisfied with the "quota-via-matchmaking" mechanism, but suggestions are of course welcome!

Thank you, cheers

--

Dario Berzano

about.me/dario.berzano

On Fri, Apr 4, 2014 at 8:18 PM, Greg Thain <gthain@xxxxxxxxxxx> wrote:

On 04/04/2014 01:00 PM, Dario Berzano wrote:

Hello all, I have managed to solve the problem by submitting the following:

Universe = vanilla
Executable = /bin/sleep
Arguments = 600
Log = myjob.log
Output  myjob.out
Error = myjob.err
# Max 2 running jobs per user
Requirements = ( isUndefined(SubmitterUserResourcesInUse) ||
(SubmitterUserResourcesInUse <= 1.0) )
Queue 5

As you've discovered, the issue is that HTCondor will match a job to a machine in several places:  First, in the negotiator, then in the schedd, and finally in the startd.  The SubmitterUserResourcesInUse attribute is only available in the negotiator, so the job would match there, but not anywhere else, and thus never run.

If your ultimate goal is to limit the number of jobs running per user, you may want to look at accounting group quotas, which can usually accomplish the same goal.

-greg
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