HPC/Applications/openmpi

Introduction

OpenMPI is the primary MPI implementation used to compile applications on Carbon.

• At present, the module provides OpenMPI-1.4. Upgrading to 1.6 will be somewhat involved - http://www.open-mpi.org/community/lists/announce/2012/05/0048.php

v1.6 is ABI compatible with the entire v1.5.x series, but is not ABI compatible with the v1.4.x series. See http://www.open-mpi.org/software/ompi/versions/ for a description of Open MPI's release methodology

Versioning scheme

The OpenMPI module versioning scheme follows the general module conventions on Carbon, but it has a compiler tag as additional dimension.

openmpi/version-compiler-build

For instance, for the OpenMPI-1.4.4 application version, the following builds exist:

openmpi/1.4.4-gcc-1
openmpi/1.4.4-intel10-1
openmpi/1.4.4-intel11-1
openmpi/1.4.4-intel12-1
openmpi/1.4.4-intel12-2

The compiler component will be of interest only when you compile applications yourself. It controls what the underlying compiler is for the MPI-wrapped compiler commands like mpicc or mpif90.

• Inspect available modules as usual, or by pre-selecting the OpenMPI application version:

module avail openmpi
module avail openmpi/1.4.4