From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from uplift.swm.pp.se (ipv6.swm.pp.se [IPv6:2a00:801::f]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id BF0EF21F1CE for ; Thu, 26 Sep 2013 19:59:14 -0700 (PDT) Received: by uplift.swm.pp.se (Postfix, from userid 501) id 293EF9C; Fri, 27 Sep 2013 04:59:11 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by uplift.swm.pp.se (Postfix) with ESMTP id 1DC5A9A; Fri, 27 Sep 2013 04:59:11 +0200 (CEST) Date: Fri, 27 Sep 2013 04:59:11 +0200 (CEST) From: Mikael Abrahamsson To: "Scheffenegger, Richard" In-Reply-To: <012C3117EDDB3C4781FD802A8C27DD4F25D8E29B@SACEXCMBX02-PRD.hq.netapp.com> Message-ID: References: <20130925143510.GA6191@sesse.net> <012C3117EDDB3C4781FD802A8C27DD4F25D8E29B@SACEXCMBX02-PRD.hq.netapp.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) Organization: People's Front Against WWW MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: "iccrg@irtf.org" , "aqm@ietf.org" , bloat Subject: Re: [Bloat] [iccrg] [aqm] AQM deployment status? X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2013 02:59:15 -0000 On Thu, 26 Sep 2013, Scheffenegger, Richard wrote: > I'd state that people operating datacenters with request-response type > data exchange via TCP do care a lot about the microscopic drop > distribution. Typically, a tail-drop queue has the unfortunate property > of losing the more critical packets of such an exchange, leading to > excessive "transaction" (higher level protocol) delays due to lengthy > TCP loss recovery. Do you know of simulations or similar that investigates this? I would like to understand why having RED on a 3ms buffer depth device makes a difference and how much difference it makes. -- Mikael Abrahamsson email: swmike@swm.pp.se