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 byrunning the, which is found in your installation directory (by default,setvars.batfile).C:\Program Files (x86)\Intel\oneAPI\mpi\<version>You must runsetvarsat the start of eachcommand-linesessionunless you are using Microsoft Visual Studio for Windows* (Visual Studio runs. See the Intel oneAPI HPC Toolkit Get Started Guide for more details, including options for automatic setup of environment settings.setvarsautomatically)
- 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:> type hosts # This line is ignored clusternode1 clusternode2 clusternode3 clusternode4
- Make sure the Hydra service is installed and running on the cluster nodes. To check this, enter the command:> hydra_service -statusIf the service is not running, use the following command to install and run it:> hydra_service -installYou must run this command as an administrator.
- Register your Windows user credentials to enable the process manager to launch MPI jobs. Credentials are encrypted and stored in the registry:> mpiexec -registerIf you do not do this in advance, you will be prompted to enter credentials when running an MPI job withmpiexec.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.