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Difference between revisions of "MPI Hello World"
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→MPI Hello World
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Hello, world, I am 3 of 4
</nowiki>
Now create a hostfile called <tt> cluster_hosts </tt> with the following entries:
<nowiki>
pnode01 slots=4 max_slots=8
pnode02 slots=4 max_slots=8
pnode03 slots=4 max_slots=8
pnode04 slots=4 max_slots=8
</nowiki>
and keep adding lines until you get to <tt> pnode40 </tt>.
The next step assumes you have set up your ssh keys as described in
With 40 nodes listed in your <tt> cluster_hosts </tt> file, run your program again with
mpirun --hostfile cluster_hosts ./hello_mpi
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