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 path.<br>
<br>Also, be sure you don&#39;t have a firewall running between the two computers.<br><br>What version of OMPI are you trying to install?<br><br><div class="gmail_quote">On Mon, Jul 27, 2009 at 9:35 AM, jacob Balthazor <span dir="ltr">&lt;<a href="mailto:jcb344@gmail.com">jcb344@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br><div>Hey,</div><div><br></div><div>      Please help me out as I cannot figure out from all the online documentation why my cluster wont work. </div>
<div><br></div><div>1) I started with two computers with a fresh install of Fedora 10.</div>
<div>2) Created two user accounts on the two computers with the same user name.</div><div>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.</div>

<div>4) Installed openmpi on both via yum with the command &quot;<span style="font-family: monospace,Tahoma,Arial,sans-serif; font-size: 10px; line-height: 21px;">yum install openmpi openmpi-devel openmpi-libs<span style="font-family: arial; font-size: small; line-height: normal;">&quot;.</span></span></div>

<div><font face="arial, Tahoma, Arial, sans-serif">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.</font></div>

<div><font face="arial, Tahoma, Arial, sans-serif"><br></font></div><div><font face="arial, Tahoma, Arial, sans-serif">      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?</font></div>

<div><font face="arial, Tahoma, Arial, sans-serif"><br></font></div><div><font face="arial, Tahoma, Arial, sans-serif">- Jacob B.</font></div><div><font face="arial, Tahoma, Arial, sans-serif"><br>
</font></div><div><font face="arial, Tahoma, Arial, sans-serif"><br></font></div><div><font face="arial, Tahoma, Arial, sans-serif"><br></font></div>
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