I guess this is client server. Can we do communications collective communications with this approach?
Thanks, Supun.. On Fri, Jul 8, 2016 at 5:37 PM, Jeff Hammond <jeff.scie...@gmail.com> wrote: > Why wouldn't https://www.open-mpi.org/doc/v1.8/man3/MPI_Comm_connect.3.php > and friends work after MPI_Init is called, regardless of how the process is > spawned? > > Jeff > > On Fri, Jul 8, 2016 at 9:55 AM, Ralph Castain <r...@open-mpi.org> wrote: > >> You’d need to have some rendezvous mechanism. I suppose one option would >> be to launch a set of PMIx servers on the nodes (and ensure they know about >> each other) to support these things, but that’s all mpirun really does >> anyway. >> >> What did you have in mind? >> >> On Jul 8, 2016, at 9:49 AM, Supun Kamburugamuve <skamburugam...@gmail.com> >> wrote: >> >> 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.. >>>> > _______________________________________________ >>>> > users mailing list >>>> > us...@open-mpi.org >>>> > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users >>>> > Link to this post: >>>> http://www.open-mpi.org/community/lists/users/2016/07/29612.php >>>> >>>> _______________________________________________ >>>> users mailing list >>>> us...@open-mpi.org >>>> Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users >>>> Link to this post: >>>> http://www.open-mpi.org/community/lists/users/2016/07/29613.php >>> >>> >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users >>> Link to this post: >>> http://www.open-mpi.org/community/lists/users/2016/07/29614.php >>> >>> >>> >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users >>> Link to this post: >>> http://www.open-mpi.org/community/lists/users/2016/07/29615.php >>> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users >> Link to this post: >> http://www.open-mpi.org/community/lists/users/2016/07/29616.php >> >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users >> Link to this post: >> http://www.open-mpi.org/community/lists/users/2016/07/29617.php >> > > > > -- > Jeff Hammond > jeff.scie...@gmail.com > http://jeffhammond.github.io/ > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/07/29627.php >
