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2. Using the Intel® MPI Library

This section describes the basic Intel® MPI Library usage model and demonstrates typical usages

of the Intel® MPI Library.

2.1. Usage Model

Using the Intel® MPI Library involves the following steps:

Figure 1: Flowchart representing the usage model for working with the Intel® MPI Library.

2.2. Before You Begin

Before using the Intel® MPI Library, ensure that the library, scripts, and utility applications are

installed. See the product Intel® MPI Library for Linux* OS Installation Guide for installation

instructions.

2.3. Quick Start

To start using the Intel® MPI Library:

1. Source the mpivars.[c]sh script to establish the proper environment settings for the Intel®

MPI Library. It is located in the <installdir>/<arch>/bin directory, where <installdir>

refers to the Intel MPI Library installation directory (for example, /opt/intel/impi) and

<arch> is one of the following architectures:

 intel64 - Intel® 64 architecture binaries.

 mic – Intel® Many Integrated Core Architecture

2. Create a hostfile text file that lists the nodes in the cluster using one host name per line.

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