> On 3 Oct 2020, at 19:12, Matthew Knepley <[email protected]> wrote:
>
> Just to make sure I understand completely, You partition a serial mesh (SELF)
> onto one process per node (1PROC), and then refine, and repartition the new
> mesh onto the whole machine (WORLD). Thus I
> need three communicators, right? And also a method, for moving a Plex on a
> subcomm onto the larger comm, using 0 parts on the new ranks.
>
I had a go at this (migration of a plex from commA to commB) some time last
year, but ran out of steam and time. I pushed my WIP as
wence/feature/dmplex-distribute-onto-comm in case its helpful.
I think implementing this should be part of a bigger discussion about what the
interface to dmplexdistribute and similar look like.
See also the thread starting here:
https://lists.mcs.anl.gov/pipermail/petsc-dev/2019-August/024843.html
Lawrence
