W3C home > Mailing lists > Public > ietf-http-wg@w3.org > January to March 2014

Proxies and packet loss

From: Peter Lepeska <bizzbyster@gmail.com>
Date: Wed, 5 Mar 2014 12:56:41 +0000
Message-ID: <CANmPAYGkdjt7BOBwk9wLDEcsTonr024eOsTDEjorFjes7+5cCA@mail.gmail.com>
To: "ietf-http-wg@w3.org" <ietf-http-wg@w3.org>
This draft (https://tools.ietf.org/html/draft-white-httpbis-spdy-analysis-00)
documents that there is a "fairly significant performance loss with SPDY"
in tests that introduced packet loss. The primary reason for this is that
fewer TCP connections are used so a single packet drop reduces bandwidth
for a greater % of the traffic at any given time.

I fear that this effect will be still worse when browsers are using a
single TCP connection to a SDPY (or HTTP/2) proxy when accessing multi-host
sites and that therefore we may want to make specific recommendations about
multiple TCP connection use when talking to explicit proxies.

I'm not sure this is something that should be mentioned in the core spec
(and discussed as part of open issue #413 on proxies) but perhaps in a
follow-on specification dedicated to proxy use in HTTP/2 -- maybe built on
Mark's proxy draft?
http://tools.ietf.org/id/draft-nottingham-http-proxy-problem-00.txt.

I'm happy to help out on such a proxy spec if it's something the group
would like to take on.

Thanks,

Peter
Received on Wednesday, 5 March 2014 12:57:08 UTC

This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 17:14:24 UTC