Re: [HTCondor-users] How to limit the number of running jobs on a startd?

[jcaballero.hep@xxxxxxxxx]

Hi Zach,

Indeed, that is the case.
Setting the limit in SLOT_TYPE_1 seems to be doing the trick :)

Cheers,
Jose

El miÃ, 9 dic 2020 a las 16:26, Zach Miller (<zmiller@xxxxxxxxxxx>) escribiÃ:
>
> Hi Jose,
>
>
>
> Are you using partitionable slots then?  If so, then using NUM_CPUS should still do what you'd want so I don't think you need to change anything.
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>
>
> Where you would run into some more difficulty is if you wanted to limit number of jobs, but some jobs were single core and some were multicore.
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>
>
>
>
> Cheers,
>
> -zach
>
>
>
>
>
> -----Original Message-----
> From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx>
> Date: Wednesday, December 9, 2020 at 7:01 AM
> To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
> Subject: Re: [HTCondor-users] How to limit the number of running jobs on a startd?
>
> HI Zach,
>
> coming back to this question, you actually pointed out the right
>
> constraint. I didn't realize that jobs are not single core.
>
> So my question actually is not how to limit the number of jobs, but
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> how to limit the number of cores.
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>
>
> Are NUM_SLOTS and NUM_SLOT_TYPE the right classads I need to play
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> with? I don't see a NUM_CORES classads ...
>
>
>
> Cheers,
>
> Jose
>
>
>
>
>
>
>
> El mar, 1 dic 2020 a las 16:41, Zach Miller (<zmiller@xxxxxxxxxxx>) escribiÃ:
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> >
>
> > Hi Jose,
>
> >
>
> >
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> >
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> > Assuming these are single core jobs, you can just set:
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> >
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> >     NUM_CPUS = 26
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> >
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> >
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> >
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> > In the config on your execute machines.  This should work whether you are using static or partitionable slots.
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> >
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> >
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> >
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> >
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> >
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> > Cheers,
>
> >
>
> > -zach
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> >
>
> >
>
> >
>
> >
>
> >
>
> > -----Original Message-----
>
> > From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx>
>
> > Date: Tuesday, December 1, 2020 at 9:54 AM
>
> > To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
>
> > Subject: [HTCondor-users] How to limit the number of running jobs on a startd?
>
> >
>
> > Hi,
>
> >
>
> >
>
> >
>
> > Is it documented somewhere the options to limit the number of jobs on
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> >
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> > a given host?
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> >
>
> > Let's say, for example, you have a host with 32 slots. By default it
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> >
>
> > can have 32 concurrent jobs. Are they easy ways to limit that to, for
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> >
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> > example, 26 jobs?
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> >
>
> >
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> >
>
> > I see there is a classad MAX_JOBS_RUNNING, but it seems to be for the
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> >
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> > schedd. Can it be used on the startd?
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> >
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> >
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> >
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> > Any suggestion is more than welcome.
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> >
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> > If documented somewhere, a link would be very helpful.
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> >
>
> >
>
> >
>
> > Cheers,
>
> >
>
> > Jose
>
> >
>
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