Thanks for the quick response. I'm having alot of fun learning MPI and this mailing list has been invaluable.
So, If I do a scatter on an inter communicator will this use all left process to scatter on all right processes? Where the left processes define MPI_ROOT and the right processes define rank. Thanks, Spenser On May 9, 2014 7:22 PM, "Jeff Squyres (jsquyres)" <jsquy...@cisco.com> wrote: > On May 9, 2014, at 7:56 PM, Spenser Gilliland <spen...@gillilanding.com> > wrote: > > > I'm having some trouble understanding Intercommunicators with > > Collective Communication. Is there a collective routine to express a > > transfer from all left process to all right processes? or vice versa? > > The intercomm collectives are all basically defined as data movement from > one group to the other (*and* vice versa), with the obvious exception of > Barrier, which has no data movement -- just synchronization. > > The key to understand is (aside from barrier): > > - collectives with intracomms are data movement in the *same* group > - collectives with intercomms are data movement to the *other* group > > -- > Jeff Squyres > jsquy...@cisco.com > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
