I don't tell OpenMPI what BTLs to use. The default uses sm and puts a session file on /tmp, which is NFS-mounted and thus not a good choice.
Are you suggesting something like --mca ^sm?
From: users-bounces_at_[hidden] [mailto:users-bounces_at_[hidden]] On Behalf Of Eugene Loh
Sent: Thursday, November 03, 2011 12:54 PM
Subject: Re: [OMPI users] EXTERNAL: Re: How to set up state-less node /tmp for OpenMPI usage
I've not been following closely. Why must one use shared-memory
communications? How about using other BTLs in a "loopback" fashion?
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