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3. Install the 4.0.0 instance in its new OPENEMPI_HOME directory. Follow the installation instructions for installing a new instance of OpenEMPI from a distribution that can be found here. The recommended approach is to install new releases in the same directory so that openempi-4.0.0 and openempi-3.5.y are in the same directory. On our installations, we follow the convention of installing new releases in the /sysnet/openempi directory so that the 4.0.0 release would be installed in the /sysnet/openempi/openempi-4.0.0 directory and the 3.5.7 release would be installed in the /sysnet/openempi/openempi-3.5.7 directory.
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