Dave Cridland wrote 2011-06-24 11:01:
I'd like to see, somewhere in this document, a discussion about
network load, and a consideration that clients (and possibly servers)
MAY, or possibly SHOULD, disable RTT if network conditions deteriorate.
There is a very brief discussion along that line in section 4.4.
The recommended transmission interval of one second and smoothing out of
characters in presentation during that second is a first good guarantee
against congestion. This is very different from the
character-by-character transmission technologies that can cause very
high network load by rapid typers.
So, the load is a maximum of one message per second from each active
typer. - About 5 kB/s.
If character-by-character transmission was used, it could end up at 20
messages per second and about 100 kB/s.
So it is a huge difference.
How much mean load does a message-wise IM participant cause? Is it one
message every 10 seconds and 1 kB/s ? Maybe a factor 5-10 less than the
RTT user.
It is a good habit to include a "Congestion considerations" section in
this kind of specifications. So, let us aim at create one.
I see the following parts can be created:
-Server congestion considerations
-Client load considerations
-Multiparty load considerations
What good bases for such discussions do you suggest to refer to?
/Gunnar
