Installing Open MPI

Procedure

Use PuTTY to log in to the server as the root user.
Run the following command to install the system dependency package:
```
yum install libxml2* systemd-devel.aarch64 numa* -y
```
Run the following command to decompress the Open MPI installation package:
```
tar -zxvf openmpi-4.0.3.tar.gz
```
Run the following command to go to source code directory:
```
cd openmpi-4.0.3
```

Run the following command to compile and configure Open MPI:

./configure --prefix=/path/to/OPENMPI --enable-pretty-print-stacktrace --enable-orterun-prefix-by-default --with-knem=/opt/knem-1.1.3.90mlnx1/ --with-hcoll=/opt/mellanox/hcoll/ --with-cma  --with-ucx  --enable-mpi1-compatibility

Run the following command to compile and install Open MPI:
```
make -j 16
make  install
```

Run the following commands to load the environment variables:

export PATH=/path/to/OPENMPI/bin:$PATH
export LD_LIBRARY_PATH=/path/to/OPENMPI/lib:$LD_LIBRARY_PATH

Parent topic: Setting Up the Environment for the Cluster Scenario