[MOAB-dev] parallel i/o, not all vertices owned?

Timothy Tautges timothy.tautges at cd-adapco.com
Sun Nov 1 22:16:05 CST 2015


Many verts are owned and not shared.
On Nov 1, 2015 10:12 PM, "Nico Schlömer" <nico.schloemer at gmail.com> wrote:

> When using MOAB's Parallel Hello-World example on [1], a mesh with  over
> 20k vertices, I'm getting
> ```
> $ mpiexec -n 3 ./par-test
>  global rank:0 color:0 rank:0 of 3 processors
>  global rank:1 color:0 rank:1 of 3 processors
> Reading file ./2.h5m
>  with options:
> PARALLEL=READ_PART;PARTITION=PARALLEL_PARTITION;PARALLEL_RESOLVE_SHARED_ENTS
>  on 3 processors on 1 communicator(s)
>  Shared, owned entities on proc 0: 452 verts, 1162 edges, 711 faces, 0
> elements
>  Shared, owned entities on proc 1: 371 verts, 1037 edges, 666 faces, 0
> elements
>  Shared, owned entities on proc 2: 0 verts, 0 edges, 0 faces, 0 elements
>
>
>  After exchanging one ghost layer:
>  Shared, owned entities on proc 0: 989 verts, 1162 edges, 711 faces, 2301
> elements
>  Shared, owned entities on proc 1: 1078 verts, 1037 edges, 666 faces, 3349
> elements
>  Shared, owned entities on proc 2: 679 verts, 0 edges, 0 faces, 3182
> elements
> ```
> Only a few hundret owned vertices? That doesn't sum to to 20k. What's the
> issue here? Maybe I misunderstand the notion of ownage here.
>
> Cheers,
> Nico
>
> [1] http://chunk.io/f/c3ee1eebbcbd4734a368ffb287f1f37f
>
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