Hi Alex
The problem is likely to be that there is no connection available
between grid03 and grid04. Did you create/define an Ethernet/IP
interface directly between those two virtual machines?
Otherwise, there is no way for MPI to communicate between them.
Ralph
On Mar 26, 2009, at 9:00 AM, Alessandro Surace wrote:
Hi Guys,
I'm really new in mpi. I've created a small grid composed of virtual
and
real host.
grid01 real/Centos/(Open MPI) 1.2.5
grid03 virtual (xen)/Centos/(Open MPI) 1.2.5
grid04 virtual (vmware)/Centos/(Open MPI) 1.2.5
When I try to run a parallel job like this:
mpirun -v -H grid01,grid04 -np 2 /mnt/ewd/mpi/fibonacci/
fibonacci_mpi
The job run
If I try instead
mpirun -v -H grid03,grid04 -np 2 /mnt/ewd/mpi/fibonacci/
fibonacci_mpi
or with all 3 nodes I get the error:
It looks like MPI_INIT failed for some reason; your parallel process
is
likely to abort. There are many reasons that a parallel process can
fail during MPI_INIT; some of which are due to configuration or
environment
problems. This failure appears to be an internal failure; here's some
additional information (which may only be relevant to an Open MPI
developer):
PML add procs failed
--> Returned "Unreachable" (-12) instead of "Success" (0)
Seems like there is something wrong between grid03, grid04.
But If I run the job indivdually on every host it runs without
problem.
I can't understand what happens.
Any Ideas?
In attach all the details.
But Does Exist a guide / howto configure and setup openmpi (not
build) ?
Thanks
Alex
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