[Trilinos-Users] Zoltan with Epetra_CrsMatrix

UTSA john.foster at utsa.edu
Mon Apr 15 19:34:35 MDT 2013

You can certainly use Zoltan directly, but perhaps an easier solution is to use Isorropia and utilize the Epetra interface and perform a hypergraph partition of the underlying Crs_Graph for your matrix.  The example  packages/isorropia/example/matrix_1.cpp should give you a good idea of how to do this.


John T. Foster
Assistant Professor of Mechanical Engineering
The University of Texas at San Antonio
AET 2.330
One UTSA Circle
San Antonio, TX 78249
john.foster at utsa.edu
On April 15, 2013 at 8:20:44 PM, Sunghwan Choi (sunghwanchoi91 at gmail.com) wrote:
Hi, I have a question on Zoltan;
I am originally Epetra user not Zoltan user. Now, my program suffers from load unbalance. To solve the problem, I considering using Zoltan or not.
My program basically uses Epetra_CrsMatrix. The main trouble is that numbers of non-zero values in rows is quite different. Thus, certain row has too many non-zero values while the other value has less non-zero values;
Is this situation proper to use Zoltan? and Does Zoltan support Epetra_CrsMatrix? Because I’ve never seen the example that use Zoltan with Epetra stuff.
Sunghwan Choi
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