I have added the following line to my .bashrc:
export OMPIFLAGS="-mca oob_tcp_include eth0 -mca btl_tcp_if_include
eth0 --hostfile ~/work/openmpi_hostfile"
and have verified that mpirun $OMPIFLAGS -np 4 hostname works.
Is there a better way of accomplishing this, or is this a matter of
there being more than one way to skin the proverbial cat?
There's definitely a better way to accomplish this. You can set mca
parameters in $OMPIDIR/etc/openmpi-mca-params.conf
There you would have btl_tcp_if_include=eth0, for instance, as well as
any other mca params you need to set (for a complete list try
ompi_info --param all all). I don't think you need oob_tcp_include, by
the way - try without it.
Alex.
> The first thing I needed to do was to make the gigabit network an
> internal zone in Yast ... firewall (which essentially turns off the
> firewall over this interface).
> Could a section be added to the FAQ mentioning that the firewall
> service should be shutdown over the mpi interface and that the two
> -mca switches should be used? This could perhaps be most useful to a
> beginner in either the 'Running MPI Jobs' or 'Troubleshooting'
> sections of the FAQ.
>
> Thanks,
>
> Mark Kosmowski
>
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