Thanks Ralph. It worked.
Regards,
Rajesh
On Sat, Jun 20, 2009 at 10:28 AM, Ralph Castain wrote:
> Ah, yes - that is definitely true. What you need to use is the "seq" (for
> "sequential") mapper. Do the following on your cmd line:
> --hostfile hostfile -mca rmaps seq
> This will cause OMPI to map
Ah, yes - that is definitely true. What you need to use is the "seq" (for
"sequential") mapper. Do the following on your cmd line:
--hostfile hostfile -mca rmaps seq
This will cause OMPI to map the process ranks according to the order in the
hostfile. You need to specify one line for each node/ran
Hi Ralph,
Thanks for the reply. The default mapper does round-robin assignment
as long as I do not specify the machinefile in the following format:
n1
n2
n2
n1where, n1 and n2 are two nodes in the cluster and I use two
slots within each node.
I have pasted the output and the display map fo
If you do "man orte_hosts", you'll see a full explanation of how the various
machinefile options work.
The default mapper doesn't do any type of sorting - it is a round-robin
mapper that just works its way through the provided nodes. We don't reorder
them in any way.
However, it does depend on the
Hi,
I tested a simple hello world program on 5 nodes each with dual
quad-core processors. I noticed that openmpi does not always follow
the order of the processors indicated in the machinefile. Depending
upon the number of processors requested, openmpi does some type of
sorting to find the best no
