[petsc-users] question about alternative to MatMatSolve

[Michael Povolotskyi]

Dear Petsc developers,
I'm using the MatMatSolve function to solve  a linear system with a 
right hand side containing many columns.

In my case each right hand side column is an almost empty vector with a 
couple of non zero entries.
Is there any way to use the fact that the right hand side is very sparse 
and make the calculations faster?

Thank you,
Michael.