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<div>Hydra supports a bunch of daemon processes, including ssh. There is a daemon process included with MPICH called "persist", which you could use for this purpose, but it's not really maintained. You could try it.</div>
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<div> -- Pavan</div>
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<span style="font-weight:bold">From: </span>unix haha<br>
<span style="font-weight:bold">Reply-To: </span>"<a href="mailto:devel@mpich.org">devel@mpich.org</a>"<br>
<span style="font-weight:bold">Date: </span>Tuesday, June 30, 2015 at 6:18 PM<br>
<span style="font-weight:bold">To: </span>"<a href="mailto:devel@mpich.org">devel@mpich.org</a>"<br>
<span style="font-weight:bold">Subject: </span>[mpich-devel] about MPI hydra process management<br>
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<div>Hi, all:<br>
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I'm working on port the MPICH2 3.1.4 to an embedded environment. I met some problems for hydra process management, Could anyone help me?<br>
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1. For the old MPD, before the mpirun, there's a daemon process running on all computer nodes. But I don't see what's hydra's daemon process in the current MPI document. Could you give me some hints?<br>
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2. As we run the MPICH2 in a resource constraint environment, the SSH or the other linux-based launcher may not be used. Does it exist any simple launcher running on the computer nodes before the mpiexec?<br>
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3. What's my understanding for hydra is: once the Launcher process running on all computer nodes, I can use the mpiexec on the control node to start the parallel jobs? If so, the problem is: Could I start the Launcher process manually if there's no linux-based
launcher? <br>
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Thanks!</div>
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