[Condor-users] Limiting jobs per machine

[Tomer Altman <taltman@xxxxxxxxxx>]

To fellow Condor users,

I am a new Condor cluster admin. Our group is interested in learning how 
to limit the number of Condor jobs per machine.

Our condor machines are set up such that for any one physical machine 
("Schnapps"), we have each core from the physical machine show up as a 
separate processor that Condor can allocate jobs to:

vm1@Schnapps. LINUX       X86_64 Unclaimed  Idle       0.000  4019  
1+07:20:50
vm2@Schnapps. LINUX       X86_64 Unclaimed  Idle       0.000  4019 
27+22:51:05
vm3@Schnapps. LINUX       X86_64 Unclaimed  Idle       0.000  4019  
0+02:50:06
vm4@Schnapps. LINUX       X86_64 Unclaimed  Idle       0.000  4019  
1+07:25:53

For small jobs, we benefit from the fine-grained scheduling. For some 
memory-intensive jobs, we don't want four instantiations of the job 
being allocated to one physical machine. I've read through the Condor 
manual, but I can't seem to figure out how to create a job description 
file that will limit the jobs of the batch to one job per physical 
machine. Any insight would be greatly appreciated.

Thank you,

~Tomer Altman


--
Tomer Altman
taltman@xxxxxxxxxx
(650)859-2692
http://www.ai.sri.com/people/taltman

Bioinformatics Research Group
Artificial Intelligence Center
SRI, International

http://bioinformatics.ai.sri.com/