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<p style="margin-bottom: 0in; line-height: 100%">Good Morning,<br>
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<p style="margin-bottom: 0in; line-height: 100%">I am trying to understand the role of job launcher (e.g. ssh ) in MPICH. I have looked over the mpich design documents and hydra process management doc. But did not get the answer I am looking for. Would you
please give the answer of my following question?</p>
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<p style="margin-bottom: 0in; line-height: 100%">1. If hydra uses ssh as a job launcher for multiple machines, then are all communications done by hydra performed using ssh tunnel? In other words, if I configure ssh in port 22, then will all communication done
by hydra with other machines use port 22? </p>
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<p style="margin-bottom: 0in; line-height: 100%"> <br>
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<p style="margin-bottom: 0in; line-height: 100%">Thank you.</p>
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<p align="left"><span style="font-size:10pt; font-family:Calibri,Helvetica,sans-serif">Best Regards,</span></p>
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<p align="left"><span style="font-size:10pt; font-family:Calibri,Helvetica,sans-serif">Abu Naser</span><br>
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