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Re: [Condor-users] Restrict Condor to don't use X cores in a multicore node.
- Date: Tue, 28 Jun 2011 17:17:25 +0200
- From: Lukas Slebodnik <slebodnik@xxxxxxxx>
- Subject: Re: [Condor-users] Restrict Condor to don't use X cores in a multicore node.
Another approch is set variable NUM_CPUS, it can be used to lie to the
condor_startd daemon about how many CPUs a machine has.
After setting this variable Condor must be restarted. Reconfiguration using
condor_reconfig will not be enough.
NUM_CPUS = 6
On Tue, Jun 28, 2011 at 11:10:05AM -0400, Ian Chesal wrote:
> On Tuesday, June 28, 2011 at 11:00 AM, Edier Zapata wrote:
> > Good morning,
> > Is there a way to avoid the use of X cores by Condor?
> > Example:
> > I have a 8 cores node, but I want Condor to use only the cores 3 to 8 and have cores 1 and 2 free of Condor's processing.
> > Is there a way to do this?
> NUM_SLOTS = 6
> to the condor_config.local file for the machine and it will only advertise 6 slots instead of 8. That's the quick way to do it. If you want 1/8th of the memory per slot instead of 1/6th you need to define a new slot type:
> SLOT_TYPE_1 = 1/8
> NUM_SLOTS_TYPE_1 = 6
> NUM_SLOTS = 6
> I think you need the NUM_SLOTS in there still to keep Condor from using the 2 additional CPUs you didn't use with TYPE_1 -- play around with that one. It's been a while since I divided things any way other than evenly.
> For details see: http://www.cs.wisc.edu/condor/manual/v7.4/3_13Setting_Up.html#sec:SMP-Divide
> - Ian
> Ian Chesal
> Cycle Computing, LLC
> Leader in Open Compute Solutions for Clouds, Servers, and Desktops
> Enterprise Condor Support and Management Tools
> > Thanks.
> > --
> > Edier Alberto Zapata Hernández
> > Ingeniero de Sistemas
> > Universidad de Valle
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