Re: [BProc] run processes on master and modify machines file

[Greg W. <gw...@la...>]

The machines file is not used. Instead, mpirun will allocate nodes  
that are available to you for execution (as shown by bpstat) or nodes  
that you specify using the NODES environment variable.

Greg

On Sep 1, 2005, at 4:53 PM, Andrew Pitre wrote:

> I've setup bproc on my development cluster (1 master, 1 slave).
> Commands execute successfully on the slave using bpsh.
>
> The clustermatic 5 version of mpich seems to be installed and working,
> however, i don't seem to be able to alter the machines file that  
> mpich uses
> to allocate processes to nodes.
>
> I've tried editing:
> /usr/mpich-p4/share/machines.LINUX
> and
> /util/machines/machines.LINUX
> to contain the ip addresses of my two nodes:
> 10.0.1.100
> 10.0.1.101
>
> > mpirun -np 2 mpiTest
> Not enough nodes to allocate all processes
>
> alternately
> > mpirun -np 1 mpiTest
> Test successful on process number: 0
> elapsed_time =
>         8.3e-05
>
> Can anyone tell me how to edit the machines file, where it is  
> located, and how to run on the master node.  Can mpich do round  
> robin process allocation within this machines file?
>
> - Andrew
>
>
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