18 Dec
2016
18 Dec
'16
9:47 p.m.
On 15.11.2016 14:44, CONZON DAVIDE wrote:
I totally agree, one of the main issues indicated by
the “opponents” to
the use of XMPP in IoT is about its overhead,
compared with other protocols, like MQTT.
I don't think that XMPP has an inherent overhead besides it being XML
based. And that overhead can likely be heavily reduced by EXI and the like.
The main problem, and that is not specific to XMPP, is bad protocol
design which imposes unnecessary packets (in XMPPs' case: stanzas) on
the wire.
So, I think that we need to avoid to have the
friendship equivalent to a
symmetric presence subscription.
In the same time, the possibility to have presence notifications must
remain as an option,
Of course. No one is talking about forbidding it. But symmetric presence
subscription should not be be *required*. And I think we should design
the XMPP IoT protocol(s) based on that assumption.
since I can imagine several scenarios where these
notifications can be
useful.
Could you elaborate on those?
- Florian