Bug#895748: Default MPI

[Drew Parsons]

On Mon, 2018-04-16 at 08:27 +0100, Alastair McKinstry wrote:
> > Now that mpich builds on all arches, it could be a good opportunity
> > to 
> > review and discuss whether we want to keep openmpi as the default
> > default, or whether we want to switch to mpich.
> > 
> I'd favour switching over to mpich for all archs for this release.
> This
> is because MPICH has the failed image support, OpenMPI hasn't.

Thanks Alastair. OpenMPI 3 has just arrived in unstable.  Is it still
the case that openmpi 3 does not provide failed image support?

Drew