Dear Hermes, The equivalent classes to SparseDirectUMFPACK for parallel linear algebra would be: - TrilinosWrappers::SolverDirect <https://dealii.org/current/doxygen/deal.II/classTrilinosWrappers_1_1SolverDirect.html> : You can choose the implementation through the AdditionalData <https://dealii.org/current/doxygen/deal.II/structTrilinosWrappers_1_1SolverDirect_1_1AdditionalData.html> struct that is passed into the class constructor. - PETScWrappers::SparseDirectMUMPS <https://dealii.org/current/doxygen/deal.II/classPETScWrappers_1_1SparseDirectMUMPS.html>
Best, Jean-Paul > On 1. Sep 2021, at 20:10, Daniel Arndt <d.arndt.m...@gmail.com> wrote: > > Hermes, > > The SparseDirectUMFPACK solver doesn't work with MPI parallel matrices. You > will need to find another solver based on the matrix class you are using. > Standard choices would be GMRES or CG but I am assuming that your linear > system might also be non-symmetric or indefinite. > > Best, > Daniel > > > > Am Mi., 1. Sept. 2021 um 11:53 Uhr schrieb Hermes Sampedro > <hermesampe...@gmail.com <mailto:hermesampe...@gmail.com>>: > Dear all, > > I am trying to solve a similar problem as step-29 but including the massive > parallel solution as presented in step-40. > I would like to ask how the solve() function would be in this case. > > In step-29: > //LU decomposition and inverse matrix > SparseDirectUMFPACK A_direct; > A_direct.initialize(system_matrix); > > //Solve with inverse matrix > A_direct.vmult(solution, system_rhs); > When applying massive parallel computations, my initial guess was: > > > LA::MPI::Vector > completely_distributed_solution(locally_owned_dofs,mpi_communicator); > > //LU decomposition and inverse matrix > SparseDirectUMFPACK A_direct; > A_direct.initialize(system_matrix); > > //Solve with inverse matrix > A_direct.vmult(completely_distributed_solution, system_rhs); > locally_relevant_solution = completely_distributed_solution; > > > However, I get a no matching member function for call to 'vmult' error. > > How can I use this LU decomposition and inverse matrix solver using MPI? > > > > Thank you, > > Regards, > > H > > > > -- > The deal.II project is located at http://www.dealii.org/ > <http://www.dealii.org/> > For mailing list/forum options, see > https://groups.google.com/d/forum/dealii?hl=en > <https://groups.google.com/d/forum/dealii?hl=en> > --- > You received this message because you are subscribed to the Google Groups > "deal.II User Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to dealii+unsubscr...@googlegroups.com > <mailto:dealii+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/dealii/ded2e156-7bd7-4474-aa5f-fb57e8540926n%40googlegroups.com > > <https://groups.google.com/d/msgid/dealii/ded2e156-7bd7-4474-aa5f-fb57e8540926n%40googlegroups.com?utm_medium=email&utm_source=footer>. > > -- > The deal.II project is located at http://www.dealii.org/ > <http://www.dealii.org/> > For mailing list/forum options, see > https://groups.google.com/d/forum/dealii?hl=en > <https://groups.google.com/d/forum/dealii?hl=en> > --- > You received this message because you are subscribed to the Google Groups > "deal.II User Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to dealii+unsubscr...@googlegroups.com > <mailto:dealii+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/dealii/CAOYDWbKG87reQPBrhZu0RwoZHrMXMtVWS9Ui6EoFCWtmemG1vQ%40mail.gmail.com > > <https://groups.google.com/d/msgid/dealii/CAOYDWbKG87reQPBrhZu0RwoZHrMXMtVWS9Ui6EoFCWtmemG1vQ%40mail.gmail.com?utm_medium=email&utm_source=footer>. -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/6B045CAD-E179-4E5F-96B6-2CC00891CA2F%40gmail.com.
