[petsc-users] Efficiently move matrix from single processor to multiple

[Hector E Barrios Molano]

Dear PETSc Experts!

Do you know if there is an efficient way to move a matrix from a single 
processor (MatCreateSeqBAIJ) to a matrix contained in all processors?

As a little bit of context, I have a code in which only one processor 
creates a matrix and a vector for a linear system of equations. Then we 
want to use a parallel solver to get the solution and give it back to a 
single processor

I tried MatView to create a binary file and MatLoad to load the matrix 
in parallel. This seems to work but performance is significantly 
decreased independent of the number of processors used.

I have some questions:

Can I share the matrix without having to write it to a file, for 
example, through a buffer?
Is there a way to efficiently avoid the overhead of writing, reading 
loading matrices to and from processors?

Thanks for your comments,

Hector
-- 
*Hector Barrios*
PhD Student, Graduate Research Assistant
Hildebrand Department of Petroleum and Geosystems Engineering
The University of Texas at Austin
hectorb at utexas.edu <mailto:hectorb at utexas.edu>
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