From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from bifrost.lang.hm (mail.lang.hm [64.81.33.126]) (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 DBF9821F457 for ; Fri, 18 Jul 2014 17:31:44 -0700 (PDT) Received: from asgard.lang.hm (asgard.lang.hm [10.0.0.100]) by bifrost.lang.hm (8.13.4/8.13.4/Debian-3) with ESMTP id s6J0VZJK028340; Fri, 18 Jul 2014 17:31:35 -0700 Date: Fri, 18 Jul 2014 17:31:35 -0700 (PDT) From: David Lang X-X-Sender: dlang@asgard.lang.hm To: Valdis.Kletnieks@vt.edu In-Reply-To: <7415.1405728276@turing-police.cc.vt.edu> Message-ID: References: <7415.1405728276@turing-police.cc.vt.edu> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: "cerowrt-devel@lists.bufferbloat.net" Subject: Re: [Cerowrt-devel] Fastpass: A Centralized "Zero-Queue" Datacenter Network X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 19 Jul 2014 00:31:45 -0000 On Fri, 18 Jul 2014, Valdis.Kletnieks@vt.edu wrote: > On Fri, 18 Jul 2014 16:20:28 -0700, David Lang said: >> not to mention the scalability issues in trying to get that info to a central >> point so that it can compute the N! possible paths for the data to take, along >> with the data from all the other systems to pack them most efficiently into the >> avilable paths. > > OK, so it converges slower than BGP. But at least it's not subject to wedgies. :) The question is if it converges faster than the traffic changes :-) If you are really aiming for zero queuing throughout the network with the links all running at full speed, you have no time to respond to new traffic. David Lang