The only thing that changes is the required connectivity. It sounds to me like you may have a firewall issue here, where cloud3 is blocking connectivity from cloud6, but cloud6 is allowing connectivity from cloud3.<br><br>
Is there a firewall in operation, per chance?<br><br>Ralph<br><br><div class="gmail_quote">On Mon, Aug 3, 2009 at 11:08 AM, David Doria <span dir="ltr">&lt;<a href="mailto:daviddoria%2Bopenmpi@gmail.com">daviddoria+openmpi@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;"><div class="im"><br><div class="gmail_quote">On Mon, Aug 3, 2009 at 9:47 AM, Ralph Castain <span dir="ltr">&lt;<a href="mailto:rhc@open-mpi.org" target="_blank">rhc@open-mpi.org</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;">
You are both correct. If you simply type &quot;mpirun pvserver&quot;, then we will execute pvserver on whatever machine is local.<br><br>However, if you type &quot;mpirun -n 1 -H host1 pvserver&quot;, then we will start pvserver on the specified host. Note that mpirun will still be executing on your local machine - but pvserver will be running on the specified host.<br>

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<br>Ralph</font><br></blockquote></div><br></div>Ralph,<br><br>Does anything change based on where mpirun is executing?<br><br>Can you shed any light on the initial question of asymmetric behavior?<br><br clear="all">Thanks,<br>
<font color="#888888">
<br>David<br>
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