[jdev] last presence confusion

Maciek Niedzielski machekku at uaznia.net
Fri Jan 25 13:06:24 CST 2008

Peter Saint-Andre wrote:
> 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:
>>>> 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.
> So do I take that as an objection to the modified text in rfc3921bis?
Not an objection. But I am a bit worried by this change when I look at 
my roster. However, at the same time I know that my roster is most 
probably not a very typical one. Do we have any stats? What's the 
percent of offline contacts? And what's typical roster size? Maybe it 
doesn't matter that presence list increases 3 times if this means 
increasing from 3 to 9 presence stanzas?

Maciek Niedzielski
  xmpp:machekku at uaznia.net

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