Re: [Condor-users] node priority

["Pasquale Tricarico" <tricaric@xxxxxxxxx>]

Thank you, Erik.

OK, so I changed NEGOTIATOR_PRE_JOB_RANK from its default value of
$(UWCS_NEGOTIATOR_PRE_JOB_RANK) to $(MEMORY), but this didn't change
the standard behaviour. So I changed it to

NEGOTIATOR_PRE_JOB_RANK = -$(MEMORY)

but now the negotiator complains:  ERROR "Error parsing
NEGOTIATOR_PRE_JOB_RANK expression: -" at line 304 in file
matchmaker.C

I'm sorry, I'm still learning Condor, can you help me figure out how
to change NEGOTIATOR_PRE_JOB_RANK so that the jobs are started on the
nodes with low memory first?

Thanks,
Pasquale

On 8/20/06, Erik Paulson <epaulson@xxxxxxxxxxx> wrote:
> On Sun, Aug 20, 2006 at 06:01:02AM -0700, Pasquale Tricarico wrote:
> > Hi,
> >
> > I'm using Condor 6.8 to manage a cluster composed by a total of 10
> > nodes: 5 with 4 GB of ram (node01 to node05), and 5 with 2 GB of ram
> > (node06 to node10). This is an X86-64 cluster, so no checkpointing or
> > migration is available (yet). Since the nodes appear in this same
> > order in the queue, when the first job is submitted it usually starts
> > on node01, then node02 and so on. The "problem" is that usually these
> > jobs start on the high memory nodes even when this is not a
> > requirement, i.e. even when the job would run perfectly with only say
> > 20 MB of ram. So what I'd like to do is configure condor so that when
> > there is not special memory requirement, a job is started on one of
> > the five nodes with low memory (node06 to node10). This because I'd
> > like to keep the high-memory nodes available for parallel jobs and for
> > jobs that really require a lot of memory. Can you please help me to
> > figure out how to achieve this configuration? Of course, when
> > migration will be available this should not be a problem anymore, but
> > this is not the case yet. And yes, renaming the nodes is not really an
> > option for me, sorry.
> >
>
> http://www.cs.wisc.edu/condor/manual/v6.8.0/3_3Configuration.html#13009
>
> -Erik
>
> > Thank you.
> >
> > Pasquale Tricarico
> > Associate Research Scientist
> > Planetary Science Institute
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