On Wed, 04 Aug 2010 08:53:16 -0400, Filippo Spiga <filippo.spiga at disco.unimib.it> wrote: > In my case that test is not useful, right?
Correct, if you have f(x) = A x - b then -snes_type test doesn't check anything new. > I didn't try UMFPACK and probably that external library is not compiled. > I will do that. But can I use "-pc_type lu,-pc_factor_mat_solver_package > umfpack" in a parallel execution? You can use mumps and superlu_dist in parallel. Or a domain decomposition method with direct subdomain solves, but then my earlier comment regarding being careful about the partition applies. Jed
