RE: [Simple] [Fwd: I-DAction:draft-saintandre-xmpp-presence-analysis-01.txt]

[Salvatore Loreto <salvatore.loreto at ericsson.com>]

Hi Peter,

I agree each protocol has its own advantages and disadvantages, 
and I also I fully agree that the two protocols (or any others) should
be compared based on the same use cases.

However we should not forget when we perform the analysis that the two
protocols have two different way to handle the basic and extended
presence , and March has explained extremely well in his previous mail

On Fri, 2007-10-05 at 17:26 +0200, Willekens, Marc wrote:
>  
> When the basic and extended presence is considered, both XMPP and SIMPLE
> have their own approaches to address these issues:
> 1.SIMPLE
> Threat both basic and extended presence as conceptually the same but use
> filtering and authorization rules so that presence engines can control
> which entities are allowed to publish and receive particular kinds of
> extended presence data. This approach keeps basic presence and extended
> presence together but tends to introduce quite a bit of complexity into
> presence engine design and implementation.
>  
> 2. XMPP
> Threat basic presence and extended presence as conceptualy similar but
> distinct by handling extended presence through dedicated pub/sub engines
> rather than core presence engines.This approach separates extended
> presence from basic presence and enables greater flexiblity and
> granularity in managing extended presence services. 

I do believe we should take this in consideration and start analyzing as
you have well done in the draft-saintandre-xmpp-simple-10 the "least
common denominator" of network availability only.

My proposal is to take in consideration the amount of bytes you obtain
translating (as done in the xmpp-simple-10) the basic XMPP in the basic
Notify.

So while I don't have any doubts xmpp is somewhat more efficient, I
think the difference will be more fear and nowhere near the difference
claimed in the draft.

Having done that we should start to think how to proceed with the
extended presence, and finally analyzing also the different optimization
in the two protocols. 

/sal



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