[Condor-users] Multi-core setup for MPI/parallel jobs?

[Steffen Grunewald <steffen.grunewald@xxxxxxxxxx>]

I've got a couple of dual-core nodes which I'd like to set aside for
Condor's parallel universe. While the basics are clear (define 
DedicatedScheduler and add it to STARTD_ATTRS), how would I tell Condor
to use both CPUs? For obvious reasons, it often would make more sense 
to use both of them in the same job, therefore 2 slots wouldn't make 
sense, would they? For now, there's an explicit declaration of

NUM_CPUS = 2
MAX_SLOT_TYPES = 1
SLOT_TYPE_1 = cpus=2, mem=100%, swap=100%, disk=100%
NUM_SLOTS_TYPE_1 = 1
NUM_SLOTS = 1

If a user requests machine_count=20, this will allocate 20 nodes when 
only 10 would be required - keeping the machines cooler but causing 
unnecessary network traffic.

Any suggestions?


Steffen


-- 
Steffen Grunewald * MPI Grav.Phys.(AEI) * Am M�erg 1, D-14476 Potsdam
Cluster Admin * http://pandora.aei.mpg.de/merlin/ * http://www.aei.mpg.de/
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