Installing OpenMPI

Prerequisites

The IOR test is based on a parallel file system. Install OpenMPI before performing the test.

Procedure

1. Install the InfiniBand (IB) driver.

   For details about how to install the IB driver, see "Installing the InfiniBand NIC Driver" in the HPC Solution Basic Environment Setup Guide.

2. Use PuTTY to log in to the server as the root user.
3. Create the /home/OpenMPI directory on the server. If a shared directory or file system exists on the server, you are advised to upload the OpenMPI installation package to and install it in the shared directory or file system.

   mkdir /home/OpenMPI

4. Upload the OpenMPI installation package openmpi-4.0.1.tar.gz to the /home/OpenMPI directory on the server.
5. Run the following command to install OpenMPI. The installation and compilation take about 30 minutes.

   cd /home/OpenMPI

   tar zxvf openmpi-4.0.1.tar.gz

   cd openmpi-4.0.1

   mkdir build

   cd build

   ../configure --prefix=/home/OpenMPI --enable-pretty-print-stacktrace --enable-orterun-prefix-by-default --with-knem=/opt/knem-1.1.3.90mlnx1/ --with-mxm=/opt/mellanox/mxm/ --with-hcoll=/opt/mellanox/hcoll/ --with-cma --with-platform=../contrib/platform/mellanox/optimized

   make && make install

6. Run the either of the following commands on all servers involved in the IOR test to configure the environment variables:
   1. vi /root/.bashrc

      or

      vi /etc/profile

   2. Press i to enter the editing mode and add the following information to the end of the /root/.bashrc or /etc/profile file:

      MPI_HOME=/home/OpenMPI
      export PATH=${MPI_HOME}/bin:$PATH
      export LD_LIBRARY_PATH=${MPI_HOME}/lib:$LD_LIBRARY_PATH

   3. Press Esc, enter :wq!, and press Enter to save the file and exit.
7. Run the following command to make the environment variables take effect:

   source /root/.bashrc

   or

   source /etc/profile