Thanks for the quick response. Is there a way for extending OpenMPI so that
it can discover the processes using other means?

Supun.

On Fri, Jul 8, 2016 at 12:45 PM, Ralph Castain <r...@open-mpi.org> wrote:

> If not spawned by mpirun, and not spawned by a resource manager, then it
> won’t work. There is no way for the procs to wireup.
>
>
> On Jul 8, 2016, at 9:42 AM, Supun Kamburugamuve <skamburugam...@gmail.com>
> wrote:
>
> Yes, the processes are not spawned by MPI and they are not spawned by
> something like Slurm/PBS.
>
> How does MPI get to know what processes running in what nodes in a general
> sense? Do we need to write some plugin so that it can figure out this
> information? I guess this must be the way it is supporting Slurm/PBS etc.
>
> Thanks,
> Supun..
>
> On Fri, Jul 8, 2016 at 12:06 PM, Ralph Castain <r...@open-mpi.org> wrote:
>
>> You mean you didn’t launch those procs via mpirun, yes? If you started
>> them via some resource manager, then you might just be able to call
>> MPI_Init and have them wireup.
>>
>>
>> > On Jul 8, 2016, at 8:55 AM, Supun Kamburugamuve <
>> skamburugam...@gmail.com> wrote:
>> >
>> > Hi,
>> >
>> > I have a set of processes running and these are not managed/spawned by
>> Open MPI. Is it possible to use Open MPI as a pure communication library
>> among these processes?
>> >
>> > Thanks,
>> > Supun..
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