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I'm trying to run the MPICH2 version of Netpipe on two systems. They're running on Debian 6, the mpdis started on both machines. mpdtrace -l says this:

mpdtrace: skimpy2_40290:  lhs=skimpy1_54864  rhs=skimpy1_54864  rhs2=skimpy2_40290 gen=1
mpdtrace: skimpy1_54864:  lhs=skimpy2_40290  rhs=skimpy2_40290  rhs2=skimpy1_54864 gen=1

To me it looks like the MPI cluster is up and running.

Now I'm trying to run NPmpich on those two nodes but I can't find any further information on the web. So I was hoping that someone here might be able to help. This is the command and its output I'm trying to use:

root@skimpy1:~# mpirun -np 2 --hostfile hostfile NPmpich
root@skimpy2's password: 
0: skimpy1
Need at least two processes (only given 1)
0: skimpy2
Need at least two processes (only given 1)

I have no clue what processes are meant here.

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