On Tue, Mar 14, 2006 at 12:00:57PM -0600, Edgar Gabriel wrote: > you are touching here a difficult area in Open MPI:
I don't doubt it. I haven't found an MPI implementation yet that does this without any quirks or oddities :> > - name publishing across independent jobs does unfortunatly not work > right now (It does work, if all processes have been started by the > same mpirun or if the have been spawned by a father process using > MPI_Comm_spawn). Your approach with passing the port as a command > line option should work however. > > - you have to start however the orted daemon *before* starting both > jobs using the flags ' orted --seed --persistent --scope public' > These flags are however currently just lightly tested, since a > brand new runtime environment with much better support for these > operations is currently under development. Ok, got it. If there is some sort of setup before hand (in this case, lanuching orted), then these independent mpi processes will have a lot easier time talking to each other. Makes sense. > - regarding the 'pack data mismatch': do both machines which you are > using have the same data representation? The reason I ask is > because this looks like a data type mismatch error, and Open MPI > currently does have some restriction regarding different data > formats and endianness... I'm just running this on the same machine. Thanks for the quick response. ==rob -- Rob Latham Mathematics and Computer Science Division A215 0178 EA2D B059 8CDF Argonne National Labs, IL USA B29D F333 664A 4280 315B
