[mpich-discuss] how to dynamically schedule process in mpich

[Shuwei Zhao]

Hi hui

I tried your suggestion but looks like the newly spawned jobs are using ssh
to distribute on the new hosts. Howver In my machine farm, ssh & rsh
connections are disabled. have to submit through qsub network interface. Is
using qsub  possible in mpi_comm_spawn?

Thanks a lot
Shuwei

On Mon, Nov 19, 2018 at 09:21 Zhou, Hui <zhouh at anl.gov> wrote:

> On Sun, Nov 18, 2018 at 10:33:48PM -0600, Shuwei Zhao wrote:
> >2. About the MPI_Info object, I tried to use mpi_comm_spawn on the same
> >machine, it can work. But I don't know how to spawn processes cross
> >machines. For example, if I have 4 processes on machine 1, and I want to
> >spawn 4 more processes on other machines (resource managed by qsub), how
> do
> >I need to declare in the MPI_Info object?
>
> Did you try setting the host parameter in the info object? For
> example:
>
>     MPI_Info info;
>     MPI_Info_create(&info, "host", "A,B,C");
>
>     MPI_Comm_spawn("worker", MPI_ARGV_NULL, n_hosts, info, 0,
> MPI_COMM_SELF, &comm_workers, MPI_ERRCODES_IGNORE)?
>
>     MPI_Info_free(&info);
>
> Replace "A,B,C" with host name list that you want to spawn process on.
>
> --
> Hui Zhou
>
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