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RE: The List (of application-layer desired features)

From: Yoav Nir <ynir@checkpoint.com>
Date: Tue, 6 Aug 2013 08:49:44 +0000
To: Roberto Peon <grmocg@gmail.com>, HTTP Working Group <ietf-http-wg@w3.org>, "tsvwg@ietf.org" <tsvwg@ietf.org>
Message-ID: <4613980CFC78314ABFD7F85CC302772111B7D710@IL-EX10.ad.checkpoint.com>
I think most of that is addressed in SCTP.  Except the deployment part. Standards people can't force vendors of operating systems or Linux distributions to include any feature. So we have a lot of "version 2"s in the IETF that take a very long time to get deployed.

It's also much more attractive to define a new thing (like SCTP) than to make something old work a little better. SCTP was sexier than TCPM.

So it took ages to get deployment of IPv6, IKEv2, TLS 1.2, and all three are still used far less than IPv4, IKEv1 and TLS 1.0. SCTP is used almost never. HTTP/2 will likely fare better because the vendors are more involved and committed, but it's hard to make predictions, especially about the future.


From: Roberto Peon [mailto:grmocg@gmail.com]
Sent: Tuesday, August 06, 2013 11:16 AM
To: HTTP Working Group; tsvwg@ietf.org
Subject: Re: The List (of application-layer desired features)

Actually sending to the right list for TSVWG...


On Tue, Aug 6, 2013 at 1:14 AM, Roberto Peon <grmocg@gmail.com<mailto:grmocg@gmail.com>> wrote:
For those of you who missed it, at the HTTPBis/TSVG joint session, a question about what applications want from the transport (I really want to put quotes around that) came up.

Here is a rendition of what was on the note that I jotted down in response to this question, and which I passed to people at the mic.

(Apps-folks want the following) Deployed in 1996:
- Prioritization
- Partial Reliability
- "Shared" congestion between multiple streams
- Security
- No HOL blocking on stream X when loss on stream Y
- Cheap/Fast  channel/connection setup
- Wide, "safe" deployment
- Competes with TCP/HTTP/1.1 (performance-wise)
- Multipath/roaming robustness, i.e. the "driveway" problem

I'll reiterate that by far the most important feature is "is deployed".
Nothing else matters until that is true, at least at the application-layer.

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