[mpas-developers] Zoltan support in MPAS

Ringler, Todd D ringler at lanl.gov
Mon Apr 15 11:55:22 MDT 2013


this was an early project with Sandia to optimize the reordering of cell indices for data locality.

this is definitely something that we will have to revisit, but we would want to rethink how we connected to zoltan anyway.

so i think removing the connection is fine.

On Apr 15, 2013, at 11:42 AM, Doug Jacobsen <jacobsen.douglas at gmail.com<mailto:jacobsen.douglas at gmail.com>> wrote:

Hey Michael,

I think it's fine to remove this. I don't know of anyone here who uses Zoltan.

Doug


On Mon, Apr 15, 2013 at 11:35 AM, Michael Duda <duda at ucar.edu<mailto:duda at ucar.edu>> wrote:
I've not heard any objections to removing the Zoltan code, but just in
case folks were particularly busy last week, I'll wait until later this
week before starting to remove this code from the trunk.

Regards,
Michael


On Mon, Apr 08, 2013 at 05:11:50PM -0600, Michael Duda wrote:
> Hi, All.
>
> The MPAS framework currently has a number of hooks to call the Zoltan
> package to reorder cells, edges, and vertices in an attempt to improve
> cache reuse; however, the code does not currently build with Zoltan,
> and I suspect it has been a couple of years since anyone has tried to
> do so. In the interest of clearing out unused or unusable code ahead of
> the initial MPAS release, I'd like to propose the idea of eliminating
> all of the Zoltan hooks in the MPAS code. Should there be any interest
> in future in trying out Zoltan, I think it would probably be a good
> idea to re-implement the functionality from scratch anyway to better
> fit with our current initialization sequence. What do you all think
> about getting rid of the Zoltan code in MPAS?
>
> Regards,
> Michael
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