Prerequisite Steps

Before you start using any of the Intel® MPI Library functionality, make sure to establish the proper environment for Intel MPI Library. Follow these steps:

1. Set up the Intel MPI Library environment. Run the mpivars.bat script:

   > <installdir>\intel64\bin\mpivars.bat

   By default, <installdir> is C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_<version>\windows\mpi.

   Note

   The mpivars.bat script sets environment variables required for working with the Intel® MPI Library. To use all the Intel MPI Library functionality, launch its commands in the same command-line session where you run the mpivars.bat script.

2. To run an MPI application on a cluster, 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:

   > type hosts
   # this line is ignored
   clusternode1
   clusternode2
   clusternode3
   clusternode4

3. 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

4. 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 Intel MPI Library.