Prerequisite Steps

Before you start using any of the Intel® MPI Library functionality, make sure to establish the proper environment settings:

1. Set up the Intel MPI Library environment by sourcing the setvars.sh script, which is found in your installation directory (by default, /opt/intel/oneapi/mpi/<version> ).

   Note

   You must run setvars at the start of each session. See the Intel oneAPI HPC Toolkit Get Started Guide for more details, including options for automatic setup of environment settings.

2. To run an MPI application on a cluster, the Intel MPI Library needs to know names of all its nodes. Create a text file listing the cluster node names. The format of the file is one name per line, and the lines starting with # are ignored. To get the name of a node, use the hostname utility.

   A sample host file may look as follows:

   $ cat ./hosts
   # This line is ignored
   clusternode1
   clusternode2
   clusternode3
   clusternode4

3. For communication between cluster nodes, in most cases the Intel MPI Library uses the SSH protocol. You need to establish a passwordless SSH connection to ensure proper communication of MPI processes.

After completing these steps, you are ready to use the Intel MPI Library.