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From: Alex Tumanov (atumanov_at_[hidden])
Date: 2007-02-08 21:40:05

> 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.


> > 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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