HP-MPI User's Guide (11th Edition)

Frequently asked questions
Windows specific
Appendix D306
Windows specific
QUESTION: What versions of Windows does HP-MPI support?
ANSWER: HP-MPI for Windows V1.0 supports Windows CCS. HP-MPI
for Windows V1.1 supports Windows 2003 and Windows XP multinode
runs with the HP-MPI Remote Launch service running on the nodes.
This service is provided with V1.1. The service is not required to run in
an SMP mode.
QUESTION: What is MPI_ROOT that I see referenced in the documentation?
ANSWER: MPI_ROOT is an environment variable that HP-MPI (mpirun)
uses to determine where HP-MPI is installed and therefore which
executables and libraries to use. It is particularly helpful when you have
multiple versions of HP-MPI installed on a system. A typical invocation
of HP-MPI on systems with multiple MPI_ROOTs installed is:
>set MPI_ROOT=\\nodex\share\test-hp-mpi-2.2.5
>"%MPI_ROOT%\bin\mpirun" ...
When HP-MPI is installed in Windows, it will automatically set
MPI_ROOT for the system to the default location. The default install
location differs between 32- and 64-bit Windows.
For 32-bit Windows, the default is:
C:\Program Files \Hewlett-Packard\HP-MPI
For 64-bit Windows, the default is:
C:\Program Files (x86)\Hewlett-Packard\HP-MPI
QUESTION: How are ranks launched on Windows?
ANSWER
: On Windows CCS, ranks are launched by scheduling HP-MPI
tasks to the existing job. These tasks are used to launch the remote
ranks. Because CPUs need to be available to schedule these tasks, the
initial mpirun task submitted must only use a single task in the job
allocation.
For additional options, refer to the release note for your specific version.
QUESTION: How do I install in a non-standard location on Windows?
ANSWER: To install HP-MPI on Windows, double-click the setup.exe,
and follow the instructions. One of the initial windows is the Select
Directory window, which indicates where to install HP-MPI.