[petsc-users] Vector with ghost values using DMDA

[Praveen C]

So I have to create a global vector AND a local vector using
DMCreateLocalVector.

Then I do DMGlobalToLocalBegin/End. Does this not lead to too much copying
? I see there is VecCreateGhost but no such thing for DMDA ?

Best
praveen

PS: Would be nice if the reply-to was set to mailing list. I frequently
forget to do Reply All.

On Wed, Oct 5, 2016 at 7:45 PM, Jed Brown <jed at jedbrown.org> wrote:

> Praveen C <cpraveen at gmail.com> writes:
>
> > Dear all
> >
> > I am using DMDA and create a vector with
> >
> > DMCreateGlobalVector
> >
> >
> > However this does not have ghost values. How should I create vector if I
> > want to access ghost values ?
>
> That's what local vectors are for.
>
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