[Standards] [Fwd: I-D Action:draft-saintandre-xmpp-presence-analysis-01.txt]

[Peter Saint-Andre]

FYI.

A more readable version is here:

http://www.xmpp.org/internet-drafts/draft-saintandre-xmpp-presence-analysis-01.html

I double-checked the numbers, but they still seem a bit incredible to
me, so if someone has time to check them I'd much appreciate it!

Here is the conclusion of the analysis...

***

With respect to presence scaling, the differences between XMPP systems
and SIP-based systems are startling. In particular, this analysis
indicates that XMPP requires only about 1.5% of the bandwidth required
by SIMPLE. There are two primary causes for this disparity: (1) XMPP
requires only about 25% of the packets required by SIMPLE and (2) XMPP
packets are about 5% of the size of SIMPLE packets for presence
notifications and 20% of the size for subscribe packets. Together, these
two factors appear to result in a significant disparity with respect to
the scalability of presence technologies. Naturally, real-world studies
of deployed systems will be necessary to determine if these theorized
differences occur in reality.

***

-------- Original Message --------

A New Internet-Draft is available from the on-line Internet-Drafts
directories.

	Title           : Interdomain Presence Scaling Analysis for the
Extensible Messaging and Presence Protocol (XMPP)
	Author(s)       : P. Saint-Andre
	Filename        : draft-saintandre-xmpp-presence-analysis-01.txt
	Pages           : 17
	Date            : 2007-10-02

This document analyzes the scalability of presence sharing between
domains that federate using the Extensible Messaging and Presence
Protocol (XMPP).  This analysis is provided as a source of comparison
with a similar analysis being performed regarding the presence
extensions to the Session Initiation Protocol (SIP).

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-saintandre-xmpp-presence-analysis-01.txt


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