Hi, I am using OGS/GE 2011.11p1 on ROCKS. We have a small cluster with a
combination of 12- and 16-core blades. We are running an application
where the specific assignment of ranks to nodes has a big effect on run
time. Is it possible, for example, with NP=64 to specify that
ranks 0-15 go to a 16-core blade,
ranks 16-27 go to a 12-core blade,
ranks 28-39 go to a 12-core blade,
ranks 40-55 go to a 16-core blade, and
ranks 56-63 go to a 12-core blade?
I tried, for this example,
qsub -binding linear:64 -l
h="compute-0-4|compute-0-0|compute-0-1|compute-0-5|compute-0-2"
(where compute nodes 4-5 are 16 core and the others are 12-core), but
that gave me no control over the order in which the nodes were assigned.
We are experimenting with Intel MPI and OpenMPI-- I couldn't figure out
how to do this with the Intel mpirun options, and rankfiles were causing
errors, so I was hoping to accomplish it with qsub.
I hope I'm asking this in the right place-- sorry if not.
Thanks for any help!
Noah
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