On Fri, 2017-07-07 at 11:47 +0200, Michael Banck wrote: > Hi, > > We (Debichem) also have a few upstreams that claim OpenMPI is more > buggy > than MPICH.
Interesting. Can you check in with them to see whether they still think that's the case, or was that poor experience with older OpenMPI versions? > > On Fri, Jul 07, 2017 at 09:22:52AM +0100, Alastair McKinstry wrote: > > The bigger question here is : how do we decide between them? > > How about we have both, at least for the core linear algebra > packages, > like scalapack etc.? I think that could be a good policy regardless of our choice of Debian default MPI. We need to upgrade scalapack, so it's a good time to make that kind of packaging change. We already have libscalapack-openmpi1. We'd rename libscalapack-mpi-dev as libscalapack-openmpi-dev and make libscalapack-mpi-dev a dummy package that depends on it (or on the mpi- default version). Then alongside we'd create libscalapack-mpich-dev and libscalapack-mpich1 Drew
