[Petsc-trilinos-discussion] Scope and requirements

[Bartlett, Roscoe A.]

I just remembered that we did have a verbal conversation with the Hydra-TH developers about 6 months or so ago about upgrading PETSc and they claimed that they could not upgrade because PETSc changed the behavior of one of their iterative solvers in such a way as to have "broken" the solver (at least from their perspective).  I assumed that they had discussed this with someone on the PETSc team about change in behavior but I guess they did not (or if they did they did not use the name "Hydra-TH" or something).   I will ask the Hydra-TH developers to make sure my memory is correct and try to get more info.

-Ross


> -----Original Message-----
> From: Jed Brown [mailto:jedbrown at mcs.anl.gov]
> Sent: Monday, November 25, 2013 10:40 AM
> To: Bartlett, Roscoe A.; 'Barry Smith'
> Cc: Matthew Knepley; petsc-trilinos-discussion at lists.mcs.anl.gov
> Subject: RE: [Petsc-trilinos-discussion] Scope and requirements
> 
> "Bartlett, Roscoe A." <bartlettra at ornl.gov> writes:
> 
> > I am not the one you have to convince.  If it is so easy to upgraded,
> > why have the Hydra-TH developers not upgraded already?  Do you have a
> > relationship with the Hydra-TH developers?
> 
> I don't know them.  Have they tried to upgrade?  People make lots of
> excuses to postpone upgrading, many of them non-technical.  Lots of
> other applications have no problem upgrading fairly promptly after new
> releases.  We always answer questions on our mailing lists.  The ball is
> in their court.