[Beowulf] mpirun command

Don Holmgren djholm at fnal.gov
Fri Dec 4 13:22:09 PST 2009

Your PC is likely running a Linux distribution that has LAM installed
by default, and "mpirun" is in your path ahead of mpich's mpirun.  You
can confirm this with `which mpirun`.

   /mirror/mpich-1.2.7p1/bin/mpirun -np 1 cpi
instead.  Or make sure that /mirror/mpich-1.2.7p1/bin is at the front of
your path.


On Fri, 4 Dec 2009, christian suhendra wrote:

> hello guys...
> im using mpich-1.2.7p1 installed on my PC
> but when i run mpirun
> i've got this error :
> suhendra18 at cluster2:/mirror/mpich-1.2.7p1/examples$ mpirun -np 1 cpi
> -----------------------------------------------------------------------------
> It seems that there is no lamd running on the host cluster2.
> This indicates that the LAM/MPI runtime environment is not operating.
> The LAM/MPI runtime environment is necessary for MPI programs to run
> (the MPI program tired to invoke the "MPI_Init" function).
> Please run the "lamboot" command the start the LAM/MPI runtime
> environment.  See the LAM/MPI documentation for how to invoke
> "lamboot" across multiple machines.
> -----------------------------------------------------------------------------
> did my mpich switch to LAM/MPI?? so what should i do??
> regards
> christian

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