Re: [Condor-users] (no subject)

["Darin Kalisak" <whognu@xxxxxxxxx>]

Thanks to you both for your help.  I guess my confusion was that I
thought that job class ads could already reference anything in the
computers' config files.  But as I understand it now, these parameters
are not accessible to jobs unless they are also placed in the
STARTD_EXPRS.  So, if I have HasMatlab = True in a config file, but
not in STARTD_EXPRS, it does nothing, and job ads trying to access it
will not be able to see that it is there?

On 5/17/06, rnayar@xxxxxxxx <rnayar@xxxxxxxx> wrote:
> Hi Darin,
>
> Yeah I think you are right. The startd_exprs is associated with the classad
> mechanism. So for example if you wanted to advertise a machine that has
> Matlab
> you would modifiy a machines local configuration file to say something
> like..
>
> HasMatlab = True
> STARTD_ATTRS = HasMatlab
>
> Then send a condor_reconfig to that machine.
>
> Then to see whether or not that classad appeared on that machine you would
> type..
>
> condor_status -l <the-machine-with-matlab>
>
> In that output, you should expect to see a line in the output that says..
>
> HasMatlab = True
>
> Then all what you would need to do when submitting a job to run only on a
> machine with matlab is make sure that HasMatlab = True is a requirement.
>
> One way to look at Start_exprs is a method to add additional information
> already advertised by your machine anyway through the condor_startd daemon.
>
> Hope any of this helps
>
> Cheers,
>
> Danny Nayar
> New Mexico State University
>
>
>
> Quoting Darin Kalisak <whognu@xxxxxxxxx>:
>
> > Hello all.
> >
> > I'm not exactly clear about the distinction and interplay between the
> > START and STARTD_EXPRS machine configuration parameters.
> >
> > Is it fair to say that the START parameter describes when the machine
> > is willing to run (by setting requirements on jobs' class ads),
> > whereas the STARTD_EXPRS adds any user-defined parameters to the
> > machine's class ad?
> >
> > If so, why is STARTD_EXPRS necessary?  I'm particularly looking at
> >
> http://www.cs.wisc.edu/condor/manual/v6.7/7_2Setting_up.html#SECTION008250000000
> 00000000,
> > about requiring packages to be installed on a machine.  If the user
> > defines a boolean parameter MY_PACKAGE_INSTALLED, why wouldn't job
> > class ads be able to access that directly, without going through
> > STARTD_EXPRS?
> >
> > Thanks,
> >
> > Darin
> >
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> >
>
>
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