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Subject: Re: [OMPI users] Installation problems
From: Ralph Castain (rhc_at_[hidden])
Date: 2009-07-27 11:47:42

Most likely problem is version confusion as Fedora comes with a version of
OMPI pre-installed. Check you LD_LIBRARY_PATH and PATH on both ends to
ensure they are pointing at the same OMPI installation. Remember,
interactive login typically uses a different shell startup then
non-interactive job launch, so be sure that the latter is getting the right

Also, be sure you don't have a firewall running between the two computers.

What version of OMPI are you trying to install?

On Mon, Jul 27, 2009 at 9:35 AM, jacob Balthazor <jcb344_at_[hidden]> wrote:

> Hey,
> Please help me out as I cannot figure out from all the online
> documentation why my cluster wont work.
> 1) I started with two computers with a fresh install of Fedora 10.
> 2) Created two user accounts on the two computers with the same user name.
> 3) Created an rsa keyed ssh between the two computers going both
> directions, so that each computer can log into one another without being
> prompted for a password.
> 4) Installed openmpi on both via yum with the command "yum install openmpi
> openmpi-devel openmpi-libs".
> 5) Compiled and ran hello.c with a host file containing the IP addresses of
> both computers with slot numbers. But openmpi only hangs for minutes, until
> I kill it.
> I am able to run hello.c locally and even with a hostfile containing
> only the local machines address, but am not able to started a multi node
> program from either computer. Have I done all the correct steps, am I
> missing something?
> - Jacob B.
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