On Mon Jun 9 12:06:27 2008, JabberForum wrote: > @All: after the tips from the posts above, I managed to find the > IETF > draft "Interdomain Presence Scaling Analysis for the Extensible > Messaging and Presence Protocol (XMPP)" , at > http://tinyurl.com/5kbumc , > which contains some insightful analysis on the stanzas numbers and > sizes. What I think is missing for a traffic characterization is the > probability distribution to use for the time to send those stanzas. > With > the information I and Jonathan manage to find from traffic analysis > I > believe we'll manage to characterize well XMPP traffic between > clients > and servers.
That's not a good draft to use, for a number of reasons. Firstly, it's been written purely and simply as a contrast with SIP/SIMPLE, and shouldn't be read on its own. Secondly, the status change (and therefore presence traffic) which the results are drawn from are thin-air figures - to my knowledge, they're not based on any real-world measurements, they were merely convenient figures which "felt" realistic for some unspecified scenarios. Thirdly, this concentrates on S2S, rather than C2S, traffic - this may or may not be relevant, but I don't think it lends academic rigour to your thesis. So for your purposes, these are almost exactly the wrong figures to use. In my case, I can pull these figures out directly - overnight, when I'm not at my desk, I get 0 <presence/> stanzas up, and an average of 0.003 <iq/> stanzas per second. (That's one every five minutes, and is actually a XEP-0199 ping being sent by the server to see if the client is still responsive). Over approximately the same period, I get an average of 0.001 <presence/> stanzas per second down - and the same number of <iq/> stanzas, of course. I would hate to claim these figures were representative of anything - in particular, on that particular XMPP account, the majority of users in my roster are EU timezones. Dave. -- Dave Cridland - mailto:[EMAIL PROTECTED] - xmpp:[EMAIL PROTECTED] - acap://acap.dave.cridland.net/byowner/user/dwd/bookmarks/ - http://dave.cridland.net/ Infotrope Polymer - ACAP, IMAP, ESMTP, and Lemonade _______________________________________________ JDev mailing list FAQ: http://www.jabber.org/discussion-lists/jdev-faq Forum: http://www.jabberforum.org/forumdisplay.php?f=20 Info: http://mail.jabber.org/mailman/listinfo/jdev Unsubscribe: [EMAIL PROTECTED] _______________________________________________
