[petsc-users] PETSc Distributed Array vs. AIJ format

[Matthew Knepley]

On Tue, Jan 14, 2014 at 4:38 AM, <Wadud.Miah at awe.co.uk> wrote:

>  Hello Petsc Users,
>
>
>
> I am using the distributed array format and have noticed it uses less
> memory than the AIJ format and less point-to-point communication. Does
> anyone know why this is so? I think the distributed array format uses less
> memory because it doesn’t use look up tables like the AIJ format does. Any
> help will be greatly appreciated.
>

The DMDA does not actually store anything. Data is kept in Vec and Mat
objects.

   Matt


> Regards,
>
> Wadud.
>
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-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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