mpich2 - will the real mpiexec please stand up

[Bill Wichser]

With the release of mpich2-v1.0 from ANL, it looks like there have been 
some major changes in job creation.  They are using a replacement 
mpirun, now called mpiexec, which requires a -n <CPU #> option  which is 
sure to wreck havoc amongst my users!

More importantly, there is now a need to launch a process manager daemon 
on all the nodes before jobs can be started.  It would have been so much 
nicer to have used the "real" mpiexec and have this all happen 
underneath the covers, especially when used with PBS/Torque.

Pete, do you have plans in the works for the "real" mpiexec to do this 
job for the users or should I be starting to think of a wrapper script 
to do this instead?  Maybe I should just modify my sample script 
documentation and just let the users revamp their scripts themselves.

Change IS a good thing right?  :-)

Bill