That is fantastic; exactly what I needed. Thank you again. Adam
> -----Original Message----- > From: Roy Stogner [mailto:[EMAIL PROTECTED] > Sent: Wednesday, October 01, 2008 2:13 PM > To: Adam Arbree > Cc: libmesh-users@lists.sourceforge.net > Subject: RE: [Libmesh-users] (no subject) > > > > On Wed, 1 Oct 2008, Adam Arbree wrote: > > > That said can you give me a sense of how large the DofMap would be > > for an AMR application, say relative the matrix storage? > > Depends - in serial, IIRC the matrix storage is much larger. In > parallel, that changes drastically, since PETSc parallelizes the > matrix properly but our SerialMesh class is duplicated on every > node. > > Do you need to use adaptive mesh coarsening? The DofObject costs > scale with the local mesh size, and if you only need adaptive mesh > refinement I think the bugs there have been worked out of our > work-in-progress ParallelMesh. > > > Also, if you were going to try as quickly as possible, but were > > willing to do what was necessary to avoid the duplication, what > > would be the way to start? > > If you're looking for "as quickly as possible", rather than something > that could be merged back into the library, it wouldn't be too > hard to write a patch that only works for your one problem. Rewrite > the DofMap to only write out dof indices if the system number is 0, > and rewrite the DofMap and DofObject to pull all requests from system > 0 information regardless of what system is really requested. > > But frankly, I wouldn't worry about it until you've benchmarked > things. IIRC I've fit a million elements in a SerialMesh into a few > GB of memory before. > --- > Roy ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
