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

Frequently asked questions
Installation and setup
Appendix D298
Installation and setup
QUESTION: Do I need a license to run HP-MPI?
ANSWER: A license is not necessary if you are running on HP-UX or an
HP XC system. Licenses are not necessary for supported ISV
applications. See “General” on page 295 for a list of currently supported
ISV applications.
In all other cases, a license is required. If you do need a license, then
follow the instructions you received with your purchase. Go to
http://licensing.hp.com and enter the information received with your
order.
QUESTION: How are the ranks launched? (Or, why do I get the message
"remshd: Login incorrect" or "Permission denied"?)
ANSWER
: There are a number of ways that HP-MPI can launch the
ranks, but some way must be made available:
• Allow passwordless rsh access by setting up hosts.equiv and/or
.rhost files to allow the mpirun machine to rsh into the execution
nodes.
• Allow passwordless ssh access from the mpirun machine to the
execution nodes and set the environment variable MPI_REMSH to the
full path of ssh.
•Use SLURM (srun) by using the -srun option to mpirun.
• Under Quadrics, use RMS (prun) by using the -prun option to
mpirun.
For Windows, see the Windows FAQ section.
QUESTION: How can I verify that HP-MPI is installed and functioning optimally
on my system?
ANSWER
: A simple hello_world test is available in
$MPI_ROOT/help/hello_world.c that can validate basic launching and
connectivity. Other more involved tests are there as well, including a
simple ping_pong_ring.c test to ensure that you are getting the
bandwidth and latency you expect. Refer to “ping_pong_ring.c (HP-UX
and Linux)” on page 229 for details.