Q-Logic Computer Drive IB0056101-00 G Benutzerhandbuch

5 – Software Installation
Additional Installation Instructions

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This InfiniPath release supports Lustre. Lustre is a fast, scalable Linux cluster file 
system that interoperates with InfiniBand. To use Lustre, you need:

„

A Linux kernel that is one of the supported kernels for this release, patched 
with Lustre-specific patches 

„

Lustre modules compiled for the above kernel

„

Lustre utilities required for configuration

The InfiniPath Release Notes provide information about the Lustre patches. For 
general instructions on downloading, installing, and using Lustre, go to:

QLogic MPI can be installed in an alternate installation location by using the 
--prefix option with rpm. This option is useful for installations that support 

multiple concurrent MPIs, for other site-specific requirements, or for smooth 
integration of QLogic MPI with mpi-selector. 
The mpi-selector utility and QLogic MPI mpi-selector registration are 

provided by RPMs in the OtherMPIs directory. 
When this option is used, the argument passed to --prefix replaces the default 
/usr prefix: QLogic MPI binaries, documentation, and libraries are installed under 

that prefix. However, a few configuration files are installed in /etc regardless of 

the desired --prefix.
Additionally, installations that are maintained in alternate locations must ensure 
that the environment variable $MPICH_ROOT is always set to the same prefix that 

was used to install the RPMs with the --prefix option. When set, the 
$MPICH_ROOT variable allows QLogic MPI to correctly locate header and library 

files for MPI compilation and running parallel jobs.

In InfiniPath 2.2, $MPICH_ROOT replaces the environment variable 
$INFINIPATH_ROOT, which is now deprecated. In InfiniPath 2.1, 
$INFINIPATH_ROOT assumed an RPM install --prefix of 
$INFINIPATH_ROOT/usr.