[Dune] Communicating IdSet elements

[Jö Fahlke]

Am Sun, 24. Jul 2011, 16:31:27 +0200 schrieb Martin Nolte:
> 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

As long as you're using a CollectiveCommunication, this currently works by
communicating the bit pattern as far as I know.  While this works in practise,
there is no guarantee that it will work for any type of id someone could
possibly think of, and of course it is hackish.

> 2) it needs to support (disk) I/O

I think we need to be more precise here: writing the id to a text file is as
easy as providing operator<<() (and operator>>() for reading).

When you think of stuff like checkpointing however, you probably want to have
a way to store the Id in a binary representation to save space and thus speed
up writing.  This calls more for a general serialization framework, and indeed
that would also help to achieve safe communication.

Bye,
Jö.

-- 
F: Was ist der Sinn des Menschen?
A: Die Menschheit voranzubringen.
F: Aber was ist der Sinn der Menschheit?
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