I believe I answered that question. You can use the hostfile info key, or you 
can use the host info key - either one will do what you require.

On May 13, 2011, at 4:11 PM, Rodrigo Silva Oliveira wrote:

> Hi,
> 
> I think I was not specific enough. I need to spawn the copies of a process in 
> a unique mpi_spawn call. It is, I have to specify a list of machines and how 
> many copies of the process will be spawned on each one. Is it possible?
> 
> I would be something like that:
> 
> machines     #copies
> m1                1
> m2                3
> m3                1
> 
> After an unique call to spawn, I want the copies running in this fashion. I 
> tried use a hostfile with the option slot, but I'm not sure if it is the best 
> way.
> 
> hostfile:
> 
> m1 slots=1
> m2 slots=3
> m3 slots=1
> 
> Thanks
> 
> -- 
> Rodrigo Silva Oliveira
> M.Sc. Student - Computer Science
> Universidade Federal de Minas Gerais
> www.dcc.ufmg.br/~rsilva
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