On Wed, 10 Feb 2010 15:16:34 -0700, Derek Gaston <[email protected]> wrote:
> I'm all for this by the way... as long as it works.  Like I mentioned
> yesterday I seem to remember some issue with calling set
> preconditioner multiple times with Petsc... especially involving
> Hypre.

This is supposed to work, but switching between different Hypre solvers
is not currently supported.  So you can switch from ASM to
Hypre:BoomerAMG to ML to Hypre:Euclid, but not directly from
Hypre:BoomerAMG to Hypre:Euclid.  If the above doesn't work, could you
send a test case?

Redirecting through something trivially cheap like Jacobi should work,
but it's a hack.  Is runtime switching between Hypre solvers something
that is important to you?  There is nothing fundamental in the design of
PC_Hypre preventing such dynamic switching, it just hasn't been
implemented.

Jed

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