Prerequisite Steps
Before you start using any of the Intel® MPI Library functionality, make sure to establish the proper environment settings:
- Set up the Intel MPI Library environment by sourcing thesetvars.sh script, which is found in your installation directory (by default,/opt/intel/oneapi).NOTE:You will need to runsetvarsat the start of each session. See the Intel oneAPI Base Toolkit Get Started Guide for more details, including options for a one-time setup.
- 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 thehostnameutility.A sample host file may look as follows:$ cat ./hosts # this line is ignored clusternode1 clusternode2 clusternode3 clusternode4
- 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.