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 sourcingrunning the setvars.sh scriptbat file, which is found in your installation directory (by default,
/opt/intel/oneapi/mpi/<version>C:\Program Files (x86)\Intel\oneAPI\mpi\<version>).
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 ./> type 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.
Make sure the Hydra service is installed and running on the cluster nodes. To check this, enter the command:
> hydra_service -status
If the service is not running, use the following command to install and run it:
> hydra_service -install
Register your Windows* user credentials to enable the process manager to launch MPI jobs. Credentials are encrypted and stored in the registry:
> mpiexec -register
If you do not do this in advance, you will be prompted to enter credentials when running an MPI job with mpiexec.
You can also use the domain-based authorization, which does not ask for your credentials, but requires some additional configuration. See User Authorization for details.
After completing these steps, you are ready to use the Intel MPI Library.