[Dune] [#777] Behaviour of GridFactory in Parallel

[Dune]

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User who did this - Martin Nolte (nolte) 

Attached to Project - Dune
Summary - Behaviour of GridFactory in Parallel
Task Type - Feature Request
Category - Grid
Status - New
Assigned To - 
Operating System - Unspecified / All
Severity - Low
Priority - Normal
Reported Version - SVN (pre2.1)
Due in Version - Undecided
Due Date - Undecided
Details - From the discussion started on FS #690:

Oliver: "I suspect that this is a gap in the specification of the grid factory. Did we ever discuss what the non-master processes should do when reading a grid?

The best way to me seems that users of the grid factory should assume that grids behave like UGGrid, hence the factory methods need to be called on all processes. Rationale: you never know what grid may need some setup on the non-master processes. If such setup is not needed (as apparently, e.g., in ALUGrid), the grid factory methods could simply be empty if rank!=0."

I think this should be discussed separately.

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http://www.dune-project.org/flyspray/index.php?do=details&task_id=777

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