Am 19.06.2006 um 20:02 schrieb Michael Kluskens:
How does OpenMPI auto-detect available hosts?
I'm running on a cluster of dual-opterons running Debian Linux.
Just using "mpirun -np 4 hostname" somehow OpenMPI located the second
dual-opteron in the stack of machines but no more than that,
regardless of how many processes I asked for.
The master node has an internal ip of 10.0.0.0 and the second node
has an ip of 10.0.0.1 and a name of "node02" and "node2"
I would suggest not to use .0 at all as a host address, as it usually
refers to a subnet by convention. And having it in the same order as
the name, avoids the offset. I mean .1 = node01, .2 = node02...
I don't know, whether this is related in any way to the effect you
observe.
Cheers - Reuti
I've been unable to find a file that contains only the name of my
second node and not the others.
I'm currently running OpenMPI 1.2a1r10297.
Michael
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