[Dune] Parallel GridFactory

[Martin Nolte]

Hi Jö,

there is a FlySpray task (FS#777) related to this issue. It seems the issue will
need a lot of further discussion. The most problematic part seem to be the
boundary segments.

For the developer meeting, Robert and I suggested to make them user data. This
way, the grid need neither load balance them nor backup and restore them. The
user will know best...

I don't know whether the issue of the GridFactory for parallel grids can be
discussed on the developer meeting. I think we simply have too little data on
the problem.

Best,

Martin

On 11/10/2010 09:14 PM, Jö Fahlke wrote:
> Hi!
> 
> Is there a uniform way to create a parallel coarse grid using the GridFactory?
> 
> AFAICT ALUGrid requires vertex and element insertion on rank==0 only.  If
> something is inserted on rank!=0 an exceptions is thrown.
> 
> In contrast, UGGrid appears to require insertion of the same vertices and
> elements on all ranks, otherwise it will throw "GridError: Couldn't extract
> grid boundary."
> 
> Thanks,
> Jö.
> 
> 
> 
> 
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-- 
Martin Nolte <nolte at mathematik.uni-freiburg.de>

Universität Freiburg                                   phone: +49-761-203-5642
Abteilung für angewandte Mathematik                    fax:   +49-761-203-5632
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