[Trilinos-Users] Stratimikos and Tpetra with preconditioners

[Bart Janssens]

Hi,

I've been trying to get to grips with Tpetra, and I want to solve a simple
2D Laplace problem as a test. With Epetra, we used Stratimikos to allow
configuring all aspects of the solution, including preconditioning type and
settings, by using Stratimikos_DefaultLinearSolverBuilder, which seems to
be Epetra-only unless I missed something. My current attempt with Tpetra is
here:
https://github.com/barche/Trilinos.jl/blob/master/deps/src/upstream_examples/laplace2d.cpp#L111-L115

The problem is that I don't see any way to add a preconditioner using just
the ParameterList, it seems only Belos can be configured. Is it correct
that adding and configuring a preconditioner like Ifpack2 or MueLu is not
supported through Stratimikos? If so, is there any advantage from going
through Thyra, it seems I might as well configure Belos directly using
parameter lists?

Anyway, long story short: what is the recommended method to add these
preconditioners?

Kind regards,

Bart
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