======Using and Building MPI======

Important information on using MPI applications on the CHPC cluster with the PBSPro scheduler.

=====Running MPI Codes=====

Do not use ''--machinefile'' option with ''mpirun'' or ''mpiexec''.

>  FIXME
>  Insert examples here of loading an MPI module and launching the the MPI code.
>


=====Building your own MPI Library=====

Firstly, **don't**.  Check if the MPI library you need is not already installed.  If not, open a ticket with Helpdesk and ask us to build it for you.

Secondly, if you really need to build your own MPI library then you must make sure it uses the PBSPro tools to launch  all MPI ranks on the nodes.  

See the "recipes" below for the most popular MPI libraries:

====OpenMPI====

FIXME

====MPICH====

FIXME


====MVAPICH====


====Intel MPI====


====HP MPI====



====Other MPI====