[petsc-users] Use block Jacobi preconditioner with SNES

[Smith, Barry F.]

> On Aug 29, 2018, at 3:48 PM, Ali Reza Khaz'ali <arkhazali at cc.iut.ac.ir> wrote:
> 
> 
>>    Can you confirm if your code ran successfully with vpbjacobi and if the convergence history was very similar to that achieved using
>> bjacobi ?
> 
> They have a very very very small difference (which is probably due to round-off errors), they generally behave the same. My code run successfully with both of them with the same convergence history. However, vpbjacobi  seems a little faster.

   Great, this is exactly what to expect. I will put the branch into next for testing and then it will be in the master branch and in the next release.

   Barry

> 
> Many thanks,
> Ali