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On Feb 16, 2012, at 9:09 AM, yanyg_at_[hidden] wrote:
> (2) Solution to this issue:
> You may set the $TMPDIR to a same directory on the same host if
> possible; or you could setenv OMPI_PREFIX_ENV to a common
> directory for MPI processes on the same host while keeping your
> $TMPDIR setting. either way is verified and working fine for me!
A clarification on this...
I found OMPI_PREFIX_ENV through some code diving, and it looks like this is an old name from previous logic. We'll actually be removing it from our SVN trunk shortly.
I think the right answer here is to use the orte_tmpdir_base MCA parameter:
mpirun --mca orte_tmpdir_base /tmp ...
This will tell OMPI where to put the session directory for all processes (even if their $TMPDIRs are different from each other). This should be used instead of setting OMPI_PREFIX_ENV.
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