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The reason for the change is because subscription happen on the first element. We were only doing push/pull and depending on the matchmaker before, so the order wasn't significant. With the addition of actual pub/sub, this change becomes necessary.

With better matchmakers, as I expect to land in Grizzly, this will be less an issue, although it might still be seen as an optimization in that case. 

Regards,
Eric Windisch


On Tuesday, September 25, 2012 at 16:55 PM, Russell Bryant wrote:

> On 09/25/2012 04:53 PM, Eric Windisch wrote:
> > Note that before this patch, it wasn't at all compatible with Quantum. 
> > 
> > Even leaving Nova as it is, it could simply be "unsupported" in Quantum.
> > 
> > For Grizzly, we can either opt to revert this change to the message format, or
> > support versioning.
> 
> 
> 
> Can you elaborate on the purpose of the format change?
> 
> Is this it? Why not just swap them back and leave it how it was?
> 
> - self.outq.send([str(msg_id), str(topic), str('cast'),
> + self.outq.send([str(topic), str(msg_id), str('cast'),
> 
> 
> -- 
> Russell Bryant