ILU for MatAIJ

Jed Brown jed at
Thu Nov 13 06:22:05 CST 2008

On Thu 2008-11-13 12:22, Tim Kroeger wrote:
> I wonder what that means because the AIJ matrix type should be able to  
> do ILU preconditioning, shouldn't it?  In other words: If not, which  
> matrix type will then be able to do that?

ILU has very poor parallel scaling and is not implemented in PETSc.
With only four processors, it may still be a reasonable choice and
Euclid from Hypre (--download-hypre) is probably the best parallel

  -pc_type hypre -pc_hypre_type euclid

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