Re: [Condor-users] determine machine matching order

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

Michael Di Domenico wrote:
> Assuming someone submits a generic vanilla universe job with no
> specifics, how does condor determine the order which to dole out the
> machine matches, assume defaults (out of the box condor setup)?  And
> can I dictate it?
>
> To be more specific (here's what i tried), our condor pool is
> comprised of three classes of machines
>
> Dedicated Condor only nodes
> HPC Clusters
> Generic computing nodes
> Desktops
>
> I'd like to ensure that if someone submits jobs with no requirements
> expressions, that nodes are matched in the above descending order.
>
> I believe currently, it's matching based on kflops, which in our case
> means matches take place all over the place.
>
> I did a condor_status -l node | grep -i rank
>
> Rank=1 * $(NODEPRIORITY)
> CurrentRank=0.0000
>
> where nodepriority is a decreasing number starting from top to bottom
> of the above list
>
> and condor_q -l <jobid>.<processid>
>
> Rank=kflops
>
> I'm not sure if I've missed something or not.
>
> Is there a better way to accomplish this?

You don't want to be using the RANK expression in condor_config - that 
is an expression that tells machines which jobs to prefer, and you want 
the opposite.

I think you can have what you want in 20 minutes. :).

My advice:

1. First get your "NODEPRIORITY" attribute inserted into the machine 
classads so it shows up when you do condor_status -l. You can follow a 
HOWTO for this here:
https://condor-wiki.cs.wisc.edu/index.cgi/wiki?p=HowToInsertClassAdIntoMachineAds

2. Next follow the HOWTO advice listed here:
https://condor-wiki.cs.wisc.edu/index.cgi/wiki?p=HowToSteerJobs

hope this helps,
Todd