[petsc-dev] DMDA_*PERIODIC and DMDA_XYZGHOSTED

[Dmitry Karpeyev]

I actually prefer the model where a geometric object (e.g., a DA) controls
the restriction (e.g., DAGlobalToLocalBegin, etc).

On Tue, Dec 7, 2010 at 2:28 PM, Jed Brown <jed at 59a2.org> wrote:

> On Tue, Dec 7, 2010 at 21:25, Dmitry Karpeev <karpeev at mcs.anl.gov> wrote:
>
>> As far as I can tell, the "local form" idea implies some mesh with a
>> stencil or overlap behind a Vec,
>> which by itself is a purely algebraic construct. Does this mean that we
>> are injecting some geometry
>> into Vec's semantics?
>>
>
> Certainly not geometry.  It's topologically-derived information which
> currently sits in VecScatter (ignoring VecGhost for now).
>
>  Jed
>
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