Re: [tcpm] TCP tuning

Michael Welzl <michawe@ifi.uio.no> Wed, 03 February 2010 21:59 UTC

Return-Path: <michawe@ifi.uio.no>
X-Original-To: tcpm@core3.amsl.com
Delivered-To: tcpm@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 5E84B3A695C for <tcpm@core3.amsl.com>; Wed, 3 Feb 2010 13:59:39 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.988
X-Spam-Level:
X-Spam-Status: No, score=-1.988 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HELO_MISMATCH_NET=0.611]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Is9zahA51O8j for <tcpm@core3.amsl.com>; Wed, 3 Feb 2010 13:59:38 -0800 (PST)
Received: from get-mta-out01.get.basefarm.net (smtp.getmail.no [84.208.15.66]) by core3.amsl.com (Postfix) with ESMTP id 7FB353A6950 for <tcpm@ietf.org>; Wed, 3 Feb 2010 13:59:38 -0800 (PST)
MIME-version: 1.0
Content-transfer-encoding: 7bit
Content-type: text/plain; charset="US-ASCII"; format="flowed"; delsp="yes"
Received: from smtp.getmail.no ([10.5.16.4]) by get-mta-out01.get.basefarm.net (Sun Java(tm) System Messaging Server 7.0-0.04 64bit (built Jun 20 2008)) with ESMTP id <0KXA00KKND4LSUE0@get-mta-out01.get.basefarm.net> for tcpm@ietf.org; Wed, 03 Feb 2010 23:00:21 +0100 (MET)
Received: from [192.168.0.194] ([84.208.136.71]) by get-mta-in01.get.basefarm.net (Sun Java(tm) System Messaging Server 7.0-0.04 64bit (built Jun 20 2008)) with ESMTP id <0KXA00KVKD3XAG30@get-mta-in01.get.basefarm.net> for tcpm@ietf.org; Wed, 03 Feb 2010 23:00:20 +0100 (MET)
X-PMX-Version: 5.5.3.366731, Antispam-Engine: 2.7.0.366912, Antispam-Data: 2010.2.3.214821
Message-id: <0F35D991-4C33-45D9-B7C0-4DB6D70A510C@ifi.uio.no>
From: Michael Welzl <michawe@ifi.uio.no>
To: Joe Touch <touch@isi.edu>
In-reply-to: <4B69C35F.9080903@isi.edu>
Date: Wed, 03 Feb 2010 22:59:57 +0100
References: <7BE9742D-6EDC-43FE-84FC-D22C52D23152@nokia.com> <4B69A53E.2050508@isi.edu> <4B69ACD9.1030105@sun.com> <4B69AE64.8070608@isi.edu> <10EDB15A-0DF6-45EE-897C-E38AA611134C@ifi.uio.no> <4B69B030.3000508@isi.edu> <D70C30EF-91E3-4DB6-B0C7-0A6328C77E6A@ifi.uio.no> <4B69B5AC.1090209@isi.edu> <8FCC1879-FBA4-4A5F-8ADF-932A6731B7EA@ifi.uio.no> <4B69C35F.9080903@isi.edu>
X-Mailer: Apple Mail (2.936)
Cc: tcpm@ietf.org, Kacheong Poon <kacheong.poon@sun.com>
Subject: Re: [tcpm] TCP tuning
X-BeenThere: tcpm@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: TCP Maintenance and Minor Extensions Working Group <tcpm.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/tcpm>
List-Post: <mailto:tcpm@ietf.org>
List-Help: <mailto:tcpm-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 03 Feb 2010 21:59:39 -0000

On Feb 3, 2010, at 7:41 PM, Joe Touch wrote:

>
>
> Michael Welzl wrote:
>>>> In other words, why not harness this knowledge somehow,
>>>> and develop a customized transport protocol, or ways of
>>>> customizing what we now have?
>>>
>>> That's been tried in various ways in various IETF efforts. Some  
>>> try to
>>> find the properties of the immediate link, which are expected for  
>>> some
>>> link types to dominate the path. Some try to detect path properties.
>>> Some reuse information from past connections.
>>
>> Really? I'd be curious about a few pointers, what exactly
>> do you have in mind? About reusing information etc., the
>> congestion manager and your TCB sharing stuff comes to
>> mind, but for the rest I'm curious
>
> Spencer Dawkins probably recalls better than I; I think there were
> numerous BOFs centered around "link indications", including:
> 	TRIGTRAN BOF
> 	"LinkUp"
> 	draft-dawkins-linkup-nevermind
> 	LCI BOF (Link Characteristic Information for Mobility)
> 	MPTCP WG
> 	LEDBAT WG
> 	RFC-4709

Thanks! I was aware about some (I liked trigtran and was sad to
see it fail) but definitely not all of these. At least LEDBAT doesn't
seem to fit in the list btw

Cheers,
Michael