[petsc-users] Updating ghost mapping for an existing vector?

Jed Brown jedbrown at mcs.anl.gov
Fri Aug 17 10:49:43 CDT 2012

On Fri, Aug 17, 2012 at 10:47 AM, Kirk, Benjamin (JSC-EG311) <
benjamin.kirk-1 at nasa.gov> wrote:

> Hello -
> I've got a contact problem with moving unstructured meshes.  The issue here
> is that the required ghost indices can change during the course of a
> simulation.  Is there a mechanism to reset the ghost indices for an
> existing
> Vec object?

It can't be done at the system level without reallocation (assuming the
number of ghost points has changed). This is a weakness of using ghost
vectors compared to explicit local work vectors. How often do you want to
do this?
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