[Dune] Communicating IdSet elements

[Martin Nolte]

Hi Patrick, hi all,

to the best of my knowledge there is no guarantee an id can be communicated
using MPI. While for a local id this does not make a lot of sense,
communication of a global id is very desirable (read: otherwise I don't see
what they are good for). If I am not mistaken, some codes actually do
communicate global ids (e.g., the AMG solver from dune-istl). So maybe there
is already a solution to your problem.

Either way, I think we need to add two important properties a global id has to
satisfy:
1) there must be an easy way to communicate it
2) it needs to support (disk) I/O

Best,

Martin

On 07/24/2011 02:54 PM, Patrick Leidenberger wrote:
> Hi all,
> 
> in my code I have to communicate members of Dune IdSet using MPI (tetraheda
> with ALUgrid).
> I have a working version, but it is so ugly and performs very, very bad that I
> do not want talk about it.
> Are the ideas around, how such a communication can be done efficient?
> 
> Have a nice day,
> 
> Patrick

-- 
Martin Nolte <nolte at mathematik.uni-freiburg.de>

Universität Freiburg                                   phone: +49-761-203-5630
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