[Condor-users] spreading I/O bound processes across a cluster

[Armen Babikyan <armenb@xxxxxxxxxx>]

Hi,

Suppose I have 12 quad-processor machines, each with a large local disk 
and a commonly-mounted NFS partition.  I setup a big Condor experiment, 
where, 20 processes will (at some stage, most often simultaneously) be 
doing a lot of I/O to the aforementioned large local disk.

Is there a simple way to get Condor to evenly spread this I/O bound 
process over all 12 of the machines?  Condor sees a 48-processor system, 
and sometimes schedules 4 of these processes on one machine, and none on 
another.  I'm not even considering the possibility of exhausting local 
diskspace yet - I just want a more-or-less even distribution of I/O over 
my cluster's component I/O subsystems.  Any ideas? :-)

Thanks!

 - Armen

--
Armen Babikyan
MIT Lincoln Laboratory
armenb@xxxxxxxxxx . 781-981-1796