Re: [Condor-users] condor_rooster - how does it work

["Smith, Ian" <I.C.Smith@xxxxxxxxxxxxxxx>]

Dan,

Only just had a chance to look at this again. That makes sense but I am
bit wary of using the Condor power saving at present as we already have
a thrid party scheme which has been working pretty well. What I has thinking
is - could we populate OFFLINE LOG using say a cron job periodically. We
can obtain ClassAds for all machines in the pool and basically just delete
those for machines which are powered up to leave the hibernating ones -
would this be likely to work.

thanks,

-ian.

> -----Original Message-----
> From: condor-users-bounces@xxxxxxxxxxx [mailto:condor-users-
> bounces@xxxxxxxxxxx] On Behalf Of Dan Bradley
> Sent: 30 November 2009 16:59
> To: Condor-Users Mail List
> Subject: Re: [Condor-users] condor_rooster - how does it work
> 
> Ian,
> 
> condor_rooster depends on there being offline ads for the hibernating
> machines.  The offline ads are created when HIBERNATE becomes true,
> assuming your collector has been configured to support offline ads
> (configure OFFLINE_LOG).
> 
> Does that help?
> 
> --Dan
> 
> Smith, Ian wrote:
> > Hello All,
> >
> > As someone who has spent a lot of effort in tying to get our Condor pool to
> > work with power saving Windows execute hosts I was very interested in
> > using condor_rooster to wake up machines automatically according to
> > demand but I cannot for the life of me understand how it works.
> >
> > Currently the power saving is performed by 3rd party s/w and we do
> > not use the hibernating features built into Condor. As far as I can
> > tell when the power saving kicks in, the Condor daemons get killed
> > and the machine disappears from the pool. I can't work out how
> > condor_rooster can work out if these machines are available for
> > wakeup when they are no longer publishing ClassAds.  I don't
> > see any persistent ClassAds for them - do I need to use the
> > HIBERNATE in the execute host config ?
> >
> > Is there any more documenation available on this - the v. 7.4 manual is a bit
> > short on info on this.
> >
> > thanks - in - advance,
> >
> > -ian.
> >
> > --------------------------------------------
> > Dr Ian C. Smith,
> > e-Science Team,
> > The University of Liverpool,
> > Computing Services Department
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