[petsc-dev] ISRestoreNonlocalIS?

Jed Brown jed at 59A2.org
Thu Nov 18 16:32:38 CST 2010

On Thu, Nov 18, 2010 at 23:27, Barry Smith <bsmith at mcs.anl.gov> wrote:

> But will this be true for all uses of ISAllGather() (or any new name given
> it) in the future?

I think ISAllGather() only makes sense if you are requesting something at
least partly redundant.  I don't know why you would want to extract e.g. a
matrix living on a global comm where each proc (or subcomm) has a full
redundant copy.

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