From owner-freebsd-hackers Fri Jul 13 11:23:20 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from avocet.mail.pas.earthlink.net (avocet.mail.pas.earthlink.net [207.217.121.50]) by hub.freebsd.org (Postfix) with ESMTP id 961CC37B403 for ; Fri, 13 Jul 2001 11:23:18 -0700 (PDT) (envelope-from tlambert2@mindspring.com) Received: from mindspring.com (dialup-209.245.130.157.Dial1.SanJose1.Level3.net [209.245.130.157]) by avocet.mail.pas.earthlink.net (EL-8_9_3_3/8.9.3) with ESMTP id LAA19630; Fri, 13 Jul 2001 11:23:09 -0700 (PDT) Message-ID: <3B4F3CB1.2A33CF02@mindspring.com> Date: Fri, 13 Jul 2001 11:23:45 -0700 From: Terry Lambert Reply-To: tlambert2@mindspring.com X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Leo Bicknell Cc: Drew Eckhardt , Matt Dillon , hackers@FreeBSD.ORG Subject: Re: Network performance tuning. References: <200107130128.f6D1SFE59148@earth.backplane.com> <200107130217.f6D2HET67695@revolt.poohsticks.org> <20010712223042.A77503@ussenterprise.ufp.org> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Leo Bicknell wrote: > On Thu, Jul 12, 2001 at 08:17:14PM -0600, Drew Eckhardt wrote: > > You can reduce the window size with each ACK, although this is frowned > > upon. > > There's "frowned upon" and "frowned upon". :-) For instance, if > the only reason it's discouraged is because it causes connections > to start running slower, then I would consider that something worth > rethinking. If there are cases where it actively causes issues > for the far end stack, then it probably should be avoided. > > That RFC is old enough that it's worth double checking that the > recommendations still make sence today. You can congest intermediate hop routers as a result of them buffering more data than you are now willing to accept. Julian's approach was much better, and much cleverer... -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message