Re: [Condor-users] Can this be done?

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

On 8/6/2012 9:52 AM, Ian Chesal wrote:
> On Monday, 6 August, 2012 at 10:44 AM, Sarah Williams wrote:
> > I would like to have something like this in my condor config:
> >
> > offline_nodes = [ 'machine01', 'machine02', 'machine03' ]
> > APPEND_REQUIREMENTS = Target.Machine not in offline_nodes
> >
> > Is there any such thing?
>
> Not quite.
>
> Requirements have to reference an attribute in the machine's ad or in
> the job's ad. They can't reference random configuration settings.

Well, you can have a "centralized" list of attributes at the central 
manager that get inserted in the job ads dynamically at match time via 
the NEGOTIATOR_MATCH_EXPRS setting - see

http://research.cs.wisc.edu/condor/manual/v7.8/3_3Configuration.html#20576

Having said that, I still would prefer Ian's solution discussed below.

regards,
Todd

> So
> you'd have to maintain that list of machines on every single machine in
> order to reference it in a requirements expression like that. Bit of a
> pain. You might as well localized the off/online-ness of a machine like so:
>
> Try adding to the Machine's configuration:
>
> IsOffline = False
> STARTD_ATTRS = $(STARTD_ATTRS), IsOffline
>
> When you want to make a machine offline you change:
>
> IsOffline = False
>
> to:
>
> IsOffline = True
>
> and reconfigure the machine.
>
> And then jobs append to their requirements:
>
> && (Target.IsOffline == False)
>
> So:
>
> APPEND_REQUIREMENTS = Target.IsOffline == False
>
> Regards,
> - Ian
>
> ---
> Ian Chesal
>
> Cycle Computing, LLC
> Leader in Open Compute Solutions for Clouds, Servers, and Desktops
> Enterprise Condor Support and Management Tools
>
> http://www.cyclecomputing.com
> http://www.cyclecloud.com
> http://twitter.com/cyclecomputing
>
>
>
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--
Todd Tannenbaum <tannenba@xxxxxxxxxxx> University of Wisconsin-Madison
Center for High Throughput Computing   Department of Computer Sciences
Condor Project Technical Lead          1210 W. Dayton St. Rm #4257
Phone: (608) 263-7132                  Madison, WI 53706-1685