Re: [HTCondor-users] HTCondor concurrency limit

[Miha Ahronovitz <myinnervoice@xxxxxxxxx>]

Ok... Maybe I do not understand the concurrency.

You are not the only one :-(  Most of the people on this thread do not understand it, but they are afraid to admit it

A blogger decided to publish his own discoveries Concurrency Limits: Protecting shared resources

See if it inspires you.

M

 

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Miha Ahronovitz

Principal | Ahrono Associates

Web: http://www.ahrono.com/

Blog: http://my-inner-voice.blogspot.com/

c: 408 422 2757

e: miha.ahronovitz@xxxxxxxxxx

tw: @myinnervoice

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On Sun, Aug 10, 2014 at 4:55 AM, Marc Volovic <marcv@xxxxxxxxxx> wrote:

Hello, sorry for the latish response - we were on a weekend :-)...

Concurrency limits are indeed listed in negotiator log and in jobs.

As a test, I set my own concurrency to 1 and started initiating condor_run 'sleep 10000' jobs.

Slowly, bit by bit, there came more and more of them running. Not what I wants :(....

Ok... Maybe I do not understand the concurrency.

Assume I am the only user of the whole cluster. I want no more than 2 of my jobs running at any given time, no matter how many free slots there are. Should I set 'marcv_limit = 2' and set SCHED_ATTRS = Owner, etc, or should I do something more violent?

Many thanks in advance,

marc

-----Original Message-----
From: HTCondor-users [mailto:htcondor-users-bounces@xxxxxxxxxxx] On Behalf Of Marc Volovic
Sent: Friday, August 08, 2014 7:29 AM
To: HTCondor-Users Mail List
Subject: Re: [HTCondor-users] HTCondor concurrency limit

I did a condor_reconfig -full -all and am pretty sure limits are in the ads. Will check logs.

The annoying bit is that a test cluster works, the production one does not.


Sent from my iPad

> On 7 Aug 2014, at 22:36, "Ben Cotton" <ben.cotton@xxxxxxxxxxxxxxxxxx> wrote:
>
> Marc,
>
> I was able to enforce limits with a configuration as you described. I
> assume you did a condor_reconfig on both your central manager and your
> scheduler? Do the concurrency limits appear in the job ad? Does
> "Concurrency Limit" appear in your negotiator log?
>
>
> Thanks,
> BC
>
> --
> Ben Cotton
> main: 888.292.5320
>
> Cycle Computing
> Leader in Utility HPC Software
>
> http://www.cyclecomputing.com
> twitter: @cyclecomputing
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