[petsc-users] How can PETSc configure with MSMPI

[Matthew Knepley]

On Sun, Feb 2, 2014 at 12:52 PM, Jed Brown <jed at jedbrown.org> wrote:

> Matthew Knepley <knepley at gmail.com> writes:
> > I don't think this is apples-to-apples since there are later versions
> > of PETSc that do everything the earlier versions do. This is a case of
> > the developer getting run over by a bus (or at least their courage)
> > and us finding a way to keep the functionality.
>
> We removed DMMG, which is "loss of functionality" in the sense that old
> code doesn't work without significant refactoring.  We got rid of it
>

But it is not a loss of functionality since we replaced it with something
that
can do everything it did. Whereas MPICH did not replace this with something
that works on Windows. It is wholly different.

  Matt


> because it was high-maintenance and non-composable.  It's not perfect
> parity, but Windows/Cygwin was dropped because it was high-maintenance,
> so it's not that different.  Developer time is in limited supply and
> Windows users tend to prefer binary installs and non-Cygwin solutions,
> so they're more prone to grumble about your Windows support than to
> thank you for maintaining it on a volunteer basis.
>
> We can disagree with the decision of the MPICH project, but I see their
> rationale.
>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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