Re: [Condor-users] Question about using Condor in a non-Grid environment

[Greg Thain <gthain@xxxxxxxxxxx>]

> Example:
> User 1 submits a job which needs 1 server, 2 linux clients, 1 windows client
> User 2 submits a job which needs 2 servers, 2 linux clients, 2 windows clients

Condor can do this with the parallel universe with multiple procs.  With 
a submit file that looks something like:

########################
universe = parallel
executable = the_binary

requirements = (opsys == "WINNT51")
machine_count = 3
queue

requirements = (opsys == "LINUX")
machine_count = 7
queue
#########################

This will create one parallel job with two "procs", the first of which 
requires 3 windows machines, the other, 7 linux machines.  Condor will 
wait until all 10 machines are available, then launch the job on those 
machines.  (Of course, the jobs will not launch on each machine 
completely simultaneously, so you may need to be aware of race 
conditions at startup).

To do this, you'll need to configure your schedd to be a dedicated 
scheduler, as described in

http://research.cs.wisc.edu/condor/manual/v7.8/3_12Setting_Up.html#SECTION004129000000000000000

An example of running jobs like this is described here:

http://research.cs.wisc.edu/condor/manual/v7.8/2_9Parallel_Applications.html#SECTION00393000000000000000

It is best if the requirements for machines in each proc in the same job 
are mutually exclusive, as Condor won't try to match every permutation 
of every possible machine to every possible part of a parallel job.

Let us know how this works for you,

-Greg