Tim,
On 5/18/2017 2:44 PM, Tim Jim wrote:
In summary, I have attempted to install OpenMPI on Ubuntu 16.04 to the
following prefix: /opt/openmpi-openmpi-2.1.0. I have also manually
added the following to my .bashrc:
export PATH="/opt/openmpi/openmpi-2.1.0/bin:$PATH"
MPI_DIR=/opt/openmpi/openmpi-2.1.0
export LD_LIBRARY_PATH=$MPI_DIR/lib:$LD_LIBRARY_PATH
I later became aware that Ubuntu may handle the LD_LIBRARY_PATH
differently and instead added a new file containing the library
path /opt/openmpi/openmpi-2.1.0/lib to
/etc/ld.so.conf.d/openmpi-2-1-0.conf, in the style of everything else
in that directory.
about that specific issue, from a linux point of view, you have two options
- have LD_LIBRARY_PATH set in your environment (manually on a per shell
basis, via .bashrc on a per user basis, via /etc/profile.d/ompi.sh on a
node basis)
- system wide via /etc/ld.so.conf.d/openmpi-2-1-0.conf (note you must
run 'ldconfig' after this file is created/updated)
Open MPI gives you an other option (that i always use and usually
recommends) :
configure with --enable-mpirun-prefix-by-default
as long as you do not plan to relocate the openmpi install directory,
you can use this option and you will not need to worry about LD_LIBRARY_PATH
any more (and if you have several install of openmpi, they will live
together in harmony)
fwiw, on HPC clusters, sysadmin usually install 'modules' or 'lmod',
which is a user friendly way to set your environment with what you need.
Cheers,
Gilles
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