Scyld Beowulf, mpirun, and pg files

Daniel Ridge newt at scyld.com
Mon Nov 13 20:03:31 EST 2000


Rob,

On Mon, 13 Nov 2000, Rob Ostrander wrote:

> Hello,
> I picked up a preview release of  Scyld Beowulf at SC2000.  It's really 
> excellent!  I had a *spare parts* cluster up and running  in just under 3 
> hours...  I Then started messing around with BeoMpi.  Their demos worked 
> fine, however I cannot seem to convince mpirun to use a process group (pg) 
> file.  Has anyone tried or had any luck using BeoMpi's mpirun with a pg 
> file?  Our app. RTExpress explicitly maps processes to hosts using a pg 
> file, and I'd like to get it to work on this Scyld Beowulf cluster.  Any 
> help would be appreciated.
> Thanks!

Thanks for trying our preview disc. We're working busily to address
the feedback we recieve. 

The preview mpirun doesn't really do this -- although you could
manually supply the -p4pg option to your MPI program.

Another thing you can do is revert to the mpich mpirun script 
(which is in /usr/mpi-beowulf/bin) which ought to do something for
you.

-Dan


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