Re: [tcpm] Increasing the Initial Window - Notes

Joe Touch <touch@isi.edu> Tue, 16 November 2010 05:43 UTC

Return-Path: <touch@isi.edu>
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 559243A6C71 for <tcpm@core3.amsl.com>; Mon, 15 Nov 2010 21:43:46 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -102.599
X-Spam-Level:
X-Spam-Status: No, score=-102.599 tagged_above=-999 required=5 tests=[AWL=0.000, BAYES_00=-2.599, USER_IN_WHITELIST=-100]
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 HAlSFBHr4fpk for <tcpm@core3.amsl.com>; Mon, 15 Nov 2010 21:43:45 -0800 (PST)
Received: from vapor.isi.edu (vapor.isi.edu [128.9.64.64]) by core3.amsl.com (Postfix) with ESMTP id 3ACD63A6C77 for <tcpm@ietf.org>; Mon, 15 Nov 2010 21:43:45 -0800 (PST)
Received: from [192.168.1.90] (pool-71-105-94-39.lsanca.dsl-w.verizon.net [71.105.94.39]) (authenticated bits=0) by vapor.isi.edu (8.13.8/8.13.8) with ESMTP id oAG5htcY020566 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=NOT); Mon, 15 Nov 2010 21:44:05 -0800 (PST)
Message-ID: <4CE21A0F.8000309@isi.edu>
Date: Mon, 15 Nov 2010 21:43:43 -0800
From: Joe Touch <touch@isi.edu>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6
MIME-Version: 1.0
To: John Heffner <johnwheffner@gmail.com>
References: <20101110152857.GA5094@hell> <AANLkTi=RzbPbVRDQh7y-ydY-P7H16wDri=8EtXP5QuV3@mail.gmail.com> <20101111012453.GB2691@hell> <29E76BE6-32D9-45AD-85A1-791DAADDE520@ifi.uio.no> <AANLkTik69zRJ7XcWK7ZKCYaHPP0=Z6hnhP1SUnYP=d=8@mail.gmail.com> <824FC88F-4877-45DC-AFD9-E5272ACD7C3E@ifi.uio.no> <4CDBCA4E.8000705@tlc.polito.it> <9C745827-D861-45D0-B096-AFC3E4FE5182@ifi.uio.no> <AANLkTinMKHVf_HAQ-YT8K-Tq9jdmpqQXdgnQyS8+gAcd@mail.gmail.com> <AANLkTinHvFGFyYvmoignyKidO93_e13QCnMj+pTRH_ud@mail.gmail.com>
In-Reply-To: <AANLkTinHvFGFyYvmoignyKidO93_e13QCnMj+pTRH_ud@mail.gmail.com>
Content-Type: text/plain; charset="ISO-8859-1"; format="flowed"
Content-Transfer-Encoding: 7bit
X-ISI-4-43-8-MailScanner: Found to be clean
X-MailScanner-From: touch@isi.edu
Cc: tcpm <tcpm@ietf.org>, tmrg <tmrg-interest@icsi.berkeley.edu>
Subject: Re: [tcpm] Increasing the Initial Window - Notes
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: Tue, 16 Nov 2010 05:43:46 -0000

On 11/15/2010 7:45 PM, John Heffner wrote:
...
> The solution would seem to be shared congestion state on the server.
> Like the "congestion manager" (http://nms.lcs.mit.edu/cm/), or using
> multiple channels in SCTP.  Of course, this may not be practical with
> a lot of load-balancing systems.

Or RFC2140, at least part of which is already in Linux. The 2140 
approach can be aggregated across machines:

    We also note that per-host-pair associations are not the limit of
    these techniques. It is possible that TCBs could be similarly shared
    between hosts on a LAN, because the predominant path can be LAN-LAN,
    rather than host-host.

Joe