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Hi ...<br><br>I think it is normal and there is no thing to worry about .<br>When you configure the MPI on your cluster and let the Master see the workers , that cause implicitly to open a socket with each worker , those sockets don't be closed if you disable the SSH .rather the sockets will be closed if you stop daemons .<br>Anyway tomorrow I will try to run a program on my cluster after disabling SSH to make sure.<br><br>> Date: Sat, 6 Mar 2010 15:30:37 +0100<br>> From: peter.smith3882100@gmail.com<br>> To: mpich-discuss@mcs.anl.gov<br>> Subject: [mpich-discuss] MPICH SSH?<br>> <br>> Hi<br>> <br>> I have installed and configured MPICH2 version 1.2.1p1 in a test<br>> environment with one master and three worker nodes. I am new to MPICH<br>> and therefore i have used different tutorials on the net to configure<br>> the package. Everything seems to function correctly, when submitting<br>> the example program from the
"Example program" section at<br>> http://en.wikipedia.org/wiki/Message_Passing_Interface i get the<br>> expected responses (i think). Passwordless SSH is configured on all<br>> machines as descriped in many of tutorials. If i disable SSH on the<br>> cluster, everything is still functional, i get the same responses from<br>> the example program and if i log into the worker nodes i can see the<br>> program being run in the task list. I dont understand why MPICH can<br>> still function when SSH is disabled?<br>> <br>> I still have a lot of reading on the subject to understand the<br>> technology, but i thougt that i was pretty clear on that MPICH needed<br>> SSH to function?<br>> _______________________________________________<br>> mpich-discuss mailing list<br>> mpich-discuss@mcs.anl.gov<br>> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss<br> <br /><hr />Hotmail: Trusted email with Microsoft’s powerful SPAM pro
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