Re: [Condor-users] Condor pool nodes using WOL

[Philipp Kolmann <kolmann@xxxxxxxxxxxxxxxx>]

I have not much problems about waking up pc's which are not supposed to wake up.
If you have this issue, you could set an AT job 10 min after the pc is booted and check if it has received any work. If it hasn't you can issue a halt command.

Philipp

On Thu, Dec 15, 2005 at 01:37:40PM +0100, Santiago Portela Garc?a-Miguel wrote:
> Hi,
> but our experience is that most commodity PC computers do 'wake'
> unexpectdly if WOL is enabled.
> 
> Any workaround ?
> 
> 
> 
> ------==== Santiago Portela ====------
> Universidad Alfonso X el Sabio, Madrid
> ---------------U.A.X.-----------------
> 
> > On 12/15/05, Philipp Kolmann <kolmann@xxxxxxxxxxxxxxxx> wrote:
> >> Hi,
> >>
> >> David Wallom schrieb:
> >> > In order to satisfy the dual needs of a department we are trying to
> >> > instigate a method of using Wake On Lan with Condor so that a small
> >> > number of nodes stay up constantly to satisfy instantaneous demand
> >> > but the rest of them are sleep able to be woken on demand... Has
> >> > anyone else tried this? It would of course save massively on
> >> > electricity etc.
> >>
> >> I have realised that. I have made a small script that I call via cron to
> >> check if there are any jobs not running in the queue and in case there
> >> are jobs in need, I issue a WOL call.
> > <snip>
> >>
> >> #!/bin/sh
> >>
> >> # Copyright Philipp Kolmann, 2005
> >> # kolmann@xxxxxxxxxxxxxxxx
> >>
> >> # Wakes machines if there are condor jobs waiting.
> >> # MacAddress List comes from lrb1. Possibility to specify a special host
> >> on the
> >> # commandline
> >>
> >> condor_q -xml | grep JobStatus
> >> if [ "$?" = "1" ]
> >> then
> >>  exit 0
> >> fi
> >
> > <snip>
> >
> > as an alternate, especially if you need to run this againts multiple
> > condor schedds,  should this script require relatively high frequency
> > execution I suggest using
> >
> > condor_status -schedd -format "%d\n" TotalIdleJobs
> >
> > Then making your script parse this appropriately is no problem and the
> > performance hit to the farm is negligble. Adding constrinats to avoid
> > querying machines which aren't allowed to use the execute machines
> > becomes simple with -constraint options.
> >
> > In general no automated tools should really try to 'scrape' info from
> > the schedd's (via condor_q) unless there is no other option.
> > Comunicate with the collector instead it is faster and has far less
> > impact to your pool.
> >
> > Matt
> >
> > _______________________________________________
> > Condor-users mailing list
> > Condor-users@xxxxxxxxxxx
> > https://lists.cs.wisc.edu/mailman/listinfo/condor-users
> >
> 
> 
> 
> 
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