[Dune-devel] On which side is DataHandleIF::size() called

[Markus Blatt]

Hi,

when I first had to deal with parallelizing a DUNE grid I somehow
assumed that the size method is only allowed to be called on the
sending side. Why else what the scatter method have the size as an
additional parameter.

Somehow I was not sure whether that assumption really holds or every
grid developers thinks so. I just wrote a handle to be used for
loadbalancing a grid from a master process to all. As a precaution I
introduced an assertion in the size method that makes sure it is only
called on rank 0. For UGGrid this assertion just failed.

Is my assumption wrong, is it a bug in UG or am I missing something
fundamental here?

Cheers,

Markus
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