[petsc-users] RCM for ILU?

[Barry Smith]

  -pc_type ilu -pc_factor_mat_ordering_type rcm

  But don’t get your hopes up to high, in our experience if you have any reasonable ordering of your underlying mesh/grid these orderings don’t generally help ILU much.

   Barry



On Feb 14, 2014, at 10:13 AM, Qin Lu <lu_qin_2000 at yahoo.com> wrote:

> Hello,
>  
> Is the RCM reordering available for ILU preconditioner in PETSc? The manual says RCM works with LU factorization, but it does not mention it for preconditioners.
>  
> If not, is there any reordering method working for ILU in PETSc, or the users have to do the work outside PETSc?
>  
> Thanks a lot for your information.
>  
> Qin