[HTCondor-users] negotiator "poor" performance issue

[Pek Daniel <pekdaniel@xxxxxxxxx>]

Hi,

I have 700 machines running startd, and 400 000 identical jobs
submitted to 10 schedds. I have 100 subcollectors on 2 machines, the
main collector on one of these machines and the negotiator on the
other.

All of the jobs are simple scripts:

#!/usr/bin/bash
exit 0

I assigned to the jobs I submitted randomized priorities, because
otherwise the negotiator would go through the schedds sequentially
(first, it runs all the jobs from schedd1, then from schedd2, etc).
I've also set:
USE_GLOBAL_JOB_PRIOS = true

I don't use job arrays or clusters and I can't consider using them,
this is a constraint.

So, what I do is:
# Turn off dispatching
condor_config_val -neg -rset "NEGOTIATOR_SLOT_CONSTRAINT = False";
condor_reconfig -neg

# Submit jobs, RANDOMPRIO ranges from 1 - 100
for i in `seq 1 N`
do
    /usr/bin/condor_submit -verbose -append 'priority = $RANDOMPRIO' submitfile
done

# Turn back on dispatching with 400 000 queued jobs on 10 schedds
condor_config_val -neg -runset NEGOTIATOR_SLOT_CONSTRAINT; condor_reconfig -neg

In this way, I could achieve ~10 jobs / sec negotiation (dispatching)
rate (not using priorities doesn't change this).

[root@condormaster1 condor]# condor_version
$CondorVersion: 8.1.2 Oct 19 2013 BuildID: 189797 $
$CondorPlatform: x86_64_RedHat6 $

My questions:
- did anybody measure before a higher dispatch rate?
- is this 10 jobs / sec considered a "normal" or "good enough" value
in case of HTCondor?
- can I do anything without touching the source to increase the
negotiation performance?

Thanks,
Daniel