[petsc-users] Suggestion for large scale Poisson's solver

[Hom Nath Gharti]

Dear all,

I am trying to solve a Poisson's equation on the Earth models with the
following information

- Degrees of freedom ~300,000,000
- I use MPIAIJ matrix
- Coefficient matrix is symmetric and doesn't change with time steps
- Need to compute for a large number of time steps

Which solver/preconditioner is the most efficient for this problem? I
would be grateful for your suggestion.

Thanks,
Hom Nath