Re: LAM: Problem with LSDyna and LAM

Michael Arndt <M.Arndtscience-computing.de&gt;

Hello Jigar

-does each cluster node have one or two network interfaces ?

keep in mind that for network connection on both nodes
lam/mpi must have the same opinion over which interface
to connect.

Translated: the hostnames in the lamhost file must resolve
to the same network !

Are the names in your hostfile are generated via the exec host list of
a batch system like PBS / SGE / LSF ?


-2nd trap: in case you do not have a NSF shared working directory
as common working directory for the calculation
the following recipe will help to resolve the real
problem easier:

mkdir -p /scratch/mydynajob on both nodes !
copy all input inclusive lamhosts file to both nodes
then start the job

dyna + lam7.0.3 works perfectly well and easy ...
so probably your problem ist a network / routing problem
of two prcesses not talking over the sanme interface

in case of problems verify also that the 2 CPU / single node job
runs on both nodes, so per se both nodes are configured ok

hth
Micha







On Sat, Mar 29, 2008 at 10:17:32AM -0700, Jigar Halani wrote:
>; Hello
>
> I have a problem running LSDyna with LAM-MPI 7.0.3. I am using precompiled LSDyna binaries with LAM 7.0.3. When I run the job using just one node, it runs fine. But if i run the job over the network on 2 machines, it fails giving an error
>
> "It seems that[at least] one of the processes that was started with mpirun did not invoke MPI_INIT before quitting
&gt; (it is possible that more than one process did not invoke MPI_INIT -- mpirun was only notified of the first one, which was on node n0"
>
> Can you please let me know what is the problem.
&gt;
> Thanks in advance,
&gt; Regards,
&gt; Jigar
>
>
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