[petsc-users] Difference between Block Jacobi and ILU?

Justin Chang jychang48 at gmail.com
Wed Jan 13 21:05:44 CST 2016

Hi all,

What exactly is the difference between these two preconditioners? When I
use them to solve a Galerkin finite element poisson problem, I get the
exact same performance (iterations, wall-clock time, etc). Only thing is I
can't seem to use ILU in parallel though.

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