[jdev] last presence confusion

[Justin Karneges]

On Friday 25 January 2008 7:06 am, Maciek Niedzielski wrote:
> On Sat, Dec 22, 2007 at 12:23:38PM -0800, Justin Karneges wrote:
> > On Thursday 20 December 2007 2:52 pm, Peter Saint-Andre wrote:
> > >    2.  Else, if the contact has no available resources, the server MUST
> > >        either (1) reply to the presence probe by sending to the user
> > > the full XML of the last presence stanza of type "unavailable" received
> > > by the server from the contact, or (2) not reply at all. So a nice
> > > server will return the last unavailable presence information (with a
> > > Delayed Delivery flag), thus obviating the need for a flood of
> > > jabber:iq:last requests.
> >
> > How about emphasizing the first option as a SHOULD?  This would hopefully
> > encourage new servers to always reply, while not causing existing servers
> > to become non-compliant.
>
> On the other hand, usually just 1/3 of my roster is online. So if server
> starts sending presence for all contacts, initial "presence flood" from
> the server increases 3 times.

The price of avoiding a jabber:iq:last flood.  Sounds like the caps 
discussion. :)

-Justin