When to use parthypre

High Performance Computing with Elmer
Post Reply
Franz Pichler
Posts: 196
Joined: 29 Sep 2011, 12:25
Antispam: Yes

When to use parthypre

Post by Franz Pichler » 03 Feb 2015, 12:52

Hi there,

i am once again struggling with hypre a little bit. I have a user defined solver with several dofs that are not a classical vector field but a monolithic solution of two equaitons. Now i try to use haypre to solve these. Thsat doesnt really worjk out for me. First question: when do i have to use the -parthypre option in partitiong the mesh? what does it change?

best regards

Franz

raback
Site Admin
Posts: 3416
Joined: 22 Aug 2009, 11:57
Antispam: Yes
Location: Espoo, Finland
Contact:

Re: When to use parthypre

Post by raback » 03 Feb 2015, 13:39

Hi

That ensures that nodes are ordered in such a way that the owned nodes in partition N have an index that is larger than those in partion N-1 but smaller than in partition N+1. I think that this may be nowadays be taken care of the ElmerSolver automatically so the flag may even be obsolite.

-Peter

Post Reply