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Subject: Re: [OMPI users] exporting PATH ineffective for finding MPI
From: Ralph Castain (rhc_at_[hidden])
Date: 2014-03-14 22:32:37

On Mar 14, 2014, at 6:58 PM, Ross Boylan <ross_at_[hidden]> wrote:

> On 3/14/2014 5:42 PM, Ralph Castain wrote:
>> Why not skip some of these problems and configure OMPI --enable-orterun-prefix-by-default?
> Cool. Thanks for the pointer. If MPI is compiled with that option, can it be overridden by the command line?
> That is, will orterun --prefix /a/b cause /a/b or the original config argument to be searched?

Good question - I honestly don't remember :-)

I think you should be able to do so, but you'd have to try it.

> Probably doesn't matter too much since I don't want to chance moving the files after make install....
> Ross
>> On Mar 14, 2014, at 5:14 PM, Ross Boylan <ross_at_[hidden]> wrote:
>>> I used this script to launch mpi:
>>> R_PROFILE_USER=~/KHC/sunbelt/Rmpiprofile LD_LIBRARY_PATH=/home/ross/install/lib:$LD_LIBRARY_PATH PATH=/home/ross/install/bin:/home/ross/install/lib64/R/bin:$PATH orterun -x R_PROFILE_USER -x LD_LIBRARY_PATH \
>>> -x PATH -hostfile ~/KHC/sunbelt/hosts -np 18 R --no-save -q
>>> For each remote node I get a message like
>>> [n11:07642] Error: unknown option "--tree-spawn"
>>> According to previous exchanges on this list that is a sign that the remote nodes are picking up the old system version of MPI instead of my new local one. Apparently the PATH values I exported are not used; presumably it's the same for LD_LIBRARY_PATH.
>>> I found this surprising.
>>> RTFM disclosed the --prefix argument to orterun, and that seems to do the trick.
>>> Am I missing anything?
>>> Ross Boylan
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