[jdev] Re: [Juser] 'lightweighting' Jabber chat for sllloooooow links...& UDP?!

[Dave Cridland]

On Thu May 18 16:42:23 2006, Peter Saint-Andre wrote:
> Lines, David wrote:
> > hi. i am looking to set up Jabber chat over a HF radio link at a 
> speed of
> > 4.8kbps and with high latency (ping ~ 7secs)!! i would love any 
> assistance
> > in where i can start to tweak for this situation. while the data 
> rate will
> > not be high for text chat, the high latency means i need to 
> reduce any
> > handshaking as much as possible. with a sniffer i notice there is 
> a large
> > amount of handshaking taking place even after the connection is 
> established.
> > i havent yet looked into detail what these packets are doing but 
> i guess i'm
> > in for a crash course in xmpp/xml/impp?! 
> What do you mean by "handshaking"?
> 
> 
Probably the roster synch, and particularly TLS/SASL/session/bind 
setup. Aside from that, the rest of XMPP doesn't use a lot of 
waited-for round-trips.

FWIW, my client implementation, being part of the rest of my 
low-bandwidth email library, has low-bandwidth, high-latency 
emulation, which can be useful for this sort of thing. It's not a 
complete XMPP implementation, though it's getting there. It also does 
debug traces, of course.

I'd be interested in exchanging notes, long thin connections with 
XMPP is something I've been meaning to look into in more detail.

Dave.
-- 
           You see things; and you say "Why?"
   But I dream things that never were; and I say "Why not?"
    - George Bernard Shaw