[GE users] MPICH mpirun and rsh versus ssh

Dalibor.Tokic Dalibor.Tokic at avinci.de
Fri May 14 07:47:53 BST 2004


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Hi!

MPICH/SSH is not a good solution.
The tight-integration of MPICH is much better!
This way you don't need any running rshd or sshd on any host.
SGE will use it's own rshd to start the MPI-processes on the hosts. 

You also have excact accounting and the control over all started
processes.

Bye

Dalibor

> -----Ursprüngliche Nachricht-----
> Von: Tod Hagan [mailto:tod at gust.sr.unh.edu]
> Gesendet: Donnerstag, 13. Mai 2004 22:13
> An: users at gridengine.sunsource.net
> Betreff: [GE users] MPICH mpirun and rsh versus ssh
> 
> 
> I've installed Grid Engine on a cluster where I've been running MPICH
> using ssh for transport. Previously, before executing mpirun 
> users would
> have to do the ssh-agent/ssh-add thing to avoid typing their password
> many times as mpirun spawned off the ssh processes.
> 
> Now that Grid Engine is installed I've set up a parallel 
> environment for
> mpich, using the templates in SGE_ROOT/mpi. When I submit an 
> mpich job,
> the mpirun command fails with this message from ssh showing up in the
> stderr output:
> 
> "Host key verification failed."
> 
> What do I need to do to get the MPICH/SSH combination working 
> under Grid
> Engine? Or do I need to recompile MPICH to use rsh?
> 
> 
> 
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