Scyld and MPI: Is it possible to launch MPI-Program on Nodes only

Dave Leimbach dleimbac at MPI-Softtech.Com
Mon Dec 11 09:22:47 EST 2000


I don't know if they (Scyld) have this as an option in their mpirun but at
MPI-Softtech we have a machines file describing exactly what machines will
run the job.

I may take a look at the source code for Scyld mpirun later to see how
difficult it is to add this functionality.  It would be useful to even
split half the cluster to one job and another half to another job...

Dave

On Mon, 11 Dec 2000, Carey F. Cox wrote:

> On Sun, 10 Dec 2000, Thomas R Boehme wrote:
> 
> > Hi,
> >
> > is there any way to launch MPI-jobs with beompi without running them on the
> > head node also?
> > We want to run multiple jobs on our cluster and don't want to use the head
> > node for more than
> > one of the jobs (actually, we'd like not to use it at all).
> >
> > Thomas Boehme
> >
> 
> Thomas,
> 
> First, I must qualify this reply; I am not familiar with Scyld's
> implementation of mpi. Having said that, most versions of mpi that
> I am familiar with have a -nolocal option for mpirun. This option
> tells mpi to not run on the local node, i.e. the one you start it
> on. An example...
> 
> 	# mpirun -nolocal -np 8 ./a.out
> 
> Hope that helps.
> 
> Carey
> 
> -- 
>  ======================================================================
> <>  Carey F. Cox, PhD          |  PHONE: (318) 257-3770               <>
> <>  Assistant Professor        |  FAX:   (318) 257-2306               <>
> <>  Dept. of Mech. Eng.        |  EMAIL: cfcox at coes.latech.edu        <>
> <>  Louisiana Tech University  |  WEB:   http://www.latech.edu/~cfcox <>
>  ======================================================================
> 
> 
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