itaps-parallel Neighbor definition

[Onkar Sahni]

> Def: for a given part, a part neighbor of dimension d is any other part
> which shares mesh entities of dimension d with that part (i.e. the
> entity is represented on both parts).

  I do not understand what is "a part neighbor of dimension d"? A part
neighbor is another part so 'd' is dimension of part.

- Onkar

>
> Rationale:
> - it is desirable to tie the definition of a part neighbor with
> information intrinsic to the mesh, i.e. one could derive information
> about part neighbors using only information about the mesh entities and
> the partition of entities over processors
>
> - in general, applications will have other criteria determining which
> other processors a given processor communicates with; that information
> can be stored in iMesh using sets and tags already, and applications
> will presumably be able to pass those things to communication functions
> in the itaps parallel interface (thus driving the application-specific
> communication patterns)
>
> Question: are ghosted/copied entities between parts considered shared?
> I would assert that ghosting/copying should be between processors, not
> parts, so this question is not relevant with respect to part neighbors.
>
> - tim
>
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>
>               Tim Tautges            Argonne National Laboratory
>           (tautges at mcs.anl.gov)      (telecommuting from UW-Madison)
>           phone: (608) 263-8485      1500 Engineering Dr.
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