[petsc-dev] Need a new name for DMDAGetOwnershipRanges

Matthew Knepley knepley at gmail.com
Mon Nov 29 16:17:11 CST 2010

On Mon, Nov 29, 2010 at 4:09 PM, Jed Brown <jed at 59a2.org> wrote:

> On Mon, Nov 29, 2010 at 23:04, Barry Smith <bsmith at mcs.anl.gov> wrote:
>> Changing the name means introducing a new concept that doesn't exist
>> elsewhere and boy do I hate having tons of concepts in PETSc.
> Agree.
>     Plus few sane people would use this routine so changing its meaning
>> won't effect many end users.
> Disagree.  I think it's pretty common (I know at least five people,
> including myself, who have done this independently) to create two or more
> DAs that are compatible (2D matches with 3D, or cell-centered and one
> node-centered) and the only robust way to do these things is to pass
> lx,ly,lz along to the next Create (perhaps with some modifications).

This does scream out for an API extension, DADuplicate(), with the same kind
of semantics as VecDuplicate().


> Jed

What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
-- Norbert Wiener
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