From owner-freebsd-stable@FreeBSD.ORG Tue May 31 19:01:24 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 69C3516A41C; Tue, 31 May 2005 19:01:24 +0000 (GMT) (envelope-from owner-freebsd-questions@freebsd.org) Received: from pythagoras.zen.co.uk (pythagoras.zen.co.uk [212.23.3.140]) by mx1.FreeBSD.org (Postfix) with ESMTP id B9B7343D48; Tue, 31 May 2005 19:01:23 +0000 (GMT) (envelope-from owner-freebsd-questions@freebsd.org) Received: from [82.69.255.50] (helo=rtxnetworks.co.uk) by pythagoras.zen.co.uk with esmtp (Exim 4.30) id 1DdBzO-0004VM-VX; Tue, 31 May 2005 19:01:23 +0000 Received: from mail pickup service by rtxnetworks.co.uk with Microsoft SMTPSVC; Tue, 31 May 2005 20:01:04 +0100 thread-index: AcVmExfGw4S47FLMRXSvnK54NETzSA== X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Date: Tue, 31 May 2005 20:01:03 +0100 From: "Jon Dama" To: In-Reply-To: <429C867A.5040909@cs.earlham.edu> References: <200505270711.j4R7BTMf078204@gw.catspoiler.org><429C867A.5040909@cs.earlham.edu> Message-ID: <000001c56613$17c64a10$144da8c0@rtxnetworks.local> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: TEXT/PLAIN; charset="US-ASCII" X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list X-Mailer: Microsoft CDO for Exchange 2000 Sender: Errors-To: owner-freebsd-questions@freebsd.org X-Zen-Test-Spam-Score: 0 X-Zen-Test-Spam-Bar: (/) X-Originating-Oppenheimer-IP: [216.136.204.119] X-Envelope-From: owner-freebsd-questions@freebsd.org X-Envelope-To: james@rtxnetworks.co.uk X-Apparently-To: james@rtxnetworks.co.uk X-Zen-Loop: 4e5e9d7b303bfa0036200918db506edf X-Zen-Stored: julia.zen.co.uk/1DdBuu-0006gc-Kv/2005-05-31 18:56:44 Content-Class: urn:content-classes:message Importance: normal X-Antivirus: AVG for E-mail 7.0.323 [267.3.0] Priority: normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.181 X-OriginalArrivalTime: 31 May 2005 19:01:04.0125 (UTC) FILETIME=[17E56AD0:01C56613] X-Originating-Pythagoras-IP: [82.69.255.50] Cc: Don Lewis , freebsd-stable@freebsd.org, freebsd-questions@freebsd.org Subject: Re: Weird NFS problems X-BeenThere: freebsd-stable@freebsd.org List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 31 May 2005 19:01:24 -0000 Yes, but surely you weren't bridging gigabit and 100Mbit before? Did you try my suggestion about binding the IP address of the NFS server to the 100Mbit side? -Jon On Tue, 31 May 2005, Skylar Thompson wrote: > Jon Dama wrote: > > >Try switching to TCP NFS. > > > >a 100MBit interface cannot keep up with a 1GBit interface in a bridge > >configuration. Therefore, in the long run, at full-bore you'd expect to > >drop 9 out of every 10 ethernet frames. > > > >MTU is 1500 therefore 1K works (it fits in one frame), 2K doesn't (your > >NFS transactions are split across frames, one of which will almost > >certainly be dropped, it's UDP so the loss of one frame invalidates the > >whole transaction). > > > >This is the same reason you can't use UDP with a block size greater than > >MTU to use NFS over your DSL or some such arrangement. > > > >Incidentially, this has nothing to do with FreeBSD. So if using TCP > >mounts solves your problem, don't expect Solaris NFS to magically make the > >UDP case work... > > > > > > The thing is that UDP NFS has been working for us for years. A big part > of our work is performance analysis, so to change our network > architecture will invalidate a large part of our data. > > -- > -- Skylar Thompson (skylar@cs.earlham.edu) > -- http://www.cs.earlham.edu/~skylar/ > > _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"