[Beowulf] mpiJava + MPICH
robl at mcs.anl.gov
Thu Jan 4 09:46:11 PST 2007
On Wed, Dec 27, 2006 at 10:46:29AM -0500, Sean Dilda wrote:
> I'm working on setting up mpiJava for a cluster user. I'm compiling it
> against Sun's Java 1.5.0 and MPICH 1.2.5, on a cluster running CentOS 4
Is mpiJava dependent on a specific vesion of MPI? Not only is
MPICH-1.2.5 a quite old version of the MPICH release, the entire
series has been superceeded by MPICH2 (unless you require
heterogenerous support). does mpijava work with MPICH2-1.0.5 ?
> I've also noticed that when a normal MPI program runs, the process tree
> shows mpirun, which has a child of your program. That child of mpirun
> then has a child that's your program running locally, and a bunch of
> children that are all the 'rsh' command for launching remote copies.
> Whenever I run a mpiJava program, the only thing in the process tree is
> mpirun and a single child of mpirun.
> Has anyone run across this, or have any ideas of what I could do to fix
> this problem?
The job management in MPICH is a little hairy. Things have been
cleaned up somewhat in MPICH2. For example, running MPICH2 progams
under valgrind is a lot easier than doing so with MPICH1-based
programs. Perhaps the same will hold for mpijava, though I know
nothing about that project.
Mathematics and Computer Science Division A215 0178 EA2D B059 8CDF
Argonne National Lab, IL USA B29D F333 664A 4280 315B
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