[Trilinos-Users] [EXTERNAL] Stratimikos and Tpetra with preconditioners

[Fuller, Timothy Jesse]

Hi Bart, I'm away from my computer at the moment, but I have several driver programs that set up Tpetra/Ifpack2/Belos problems.  I can send them your way if it would help

Cheers,

-- Tim --

Tim Fuller, PhD
Scalable Algorithms
Organization 1426
Sandia National Laboratories
E: tjfulle at sandia.gov<mailto:tjfulle at sandia.gov>
P: (505) 205-0003

On Apr 15, 2017, at 4:48 PM, Bart Janssens <bart at bartjanssens.org<mailto:bart at bartjanssens.org>> wrote:

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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