Re: [HTCondor-devel] Fwd: Re: [HTCondor-users] disable preemption

[Matthew Farrellee <matt@xxxxxxxxxx>]

I'd say MaxJobRetirementTime fails simple - it must be configured on all 
exec nodes - and fails obvious - max what what? preemption!
+1 off by default, but there should be a simple and obvious way to enable it

Best,


matt

On 07/31/2013 03:16 PM, Todd Tannenbaum wrote:
> On 7/31/2013 2:07 PM, Matthew Farrellee wrote:
> > This question comes up so often, there should really be a single,
> > obvious configuration change to make...
> Yes. There is one. It is called MaxJobRetirementTime.  The problem is
> prior to v8.0, there were nasty side effects of using
> MaxJobRetirementTime. These were fixed in v7.9.6 - see
>    https://htcondor-wiki.cs.wisc.edu/index.cgi/tktview?tn=3539
>
> So now the imo the best wisdom I tell folks is simply use
> MaxJobRetirementTime if using v8.0 or above.
>
> For v8.1, I think we should have preemption disabled by default.  I.e.
> folks should opt-in to enable preemption. Thoughts?
>
> Todd
>
>
>
> > -------- Original Message --------
> > Subject: Re: [HTCondor-users] disable preemption
> > Date: Wed, 31 Jul 2013 11:38:35 -0400
> > From: Ben Cotton <ben.cotton@xxxxxxxxxxxxxxxxxx>
> > Reply-To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
> > To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
> >
> > Have you taken a look at the section in the manual?
> > http://research.cs.wisc.edu/htcondor/manual/v7.8/3_5Policy_Configuration.html#SECTION00459500000000000000
> >
> >
> >
> > Specifically:
> >
> > #Disable preemption by machine activity.
> > PREEMPT = False
> > #Disable preemption by user priority.
> > PREEMPTION_REQUIREMENTS = False
> > #Disable preemption by machine RANK by ranking all jobs equally.
> > RANK = 0
> > #Since we are disabling claim preemption, we
> > # may as well optimize negotiation for this case:
> > NEGOTIATOR_CONSIDER_PREEMPTION = False
> >
> > There are several ways HTCondor may preempt a job, so you'll want to
> > make sure you cover all the bases.