From owner-freebsd-stable@FreeBSD.ORG Tue May 31 15:46:11 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 6B8C216A41C; Tue, 31 May 2005 15:46:11 +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 9602743D1D; Tue, 31 May 2005 15:46:10 +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 1Dd8wT-0005YL-Q8; Tue, 31 May 2005 15:46:09 +0000 Received: from mail pickup service by rtxnetworks.co.uk with Microsoft SMTPSVC; Tue, 31 May 2005 16:45:50 +0100 thread-index: AcVl99Hfdi1VexrlSlaIZca54MzhFg== X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Date: Tue, 31 May 2005 16:45:50 +0100 From: "Skylar Thompson" Organization: Earlham College Computer Science Department User-Agent: Mozilla Thunderbird 1.0 (X11/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: References: <200505270711.j4R7BTMf078204@gw.catspoiler.org> Message-ID: <000101c565f7$d1df7fa0$144da8c0@rtxnetworks.local> In-Reply-To: Content-Transfer-Encoding: 7bit X-Enigmail-Version: 0.89.5.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig3DAFB34E835079E79DE17BB3" X-Greylist: Sender succeded SMTP AUTH authentication, not delayed bymilter-greylist-1.6 (cs.earlham.edu [159.28.230.3]); Tue, 31 May 2005 10:45:05 -0500 (EST) X-Virus-Scanned: ClamAV 0.85.1/900/Tue May 31 05:50:19 2005 onquark.cs.earlham.edu X-Virus-Status: Clean X-Sanitizer: This message has passed the MIMEDefang sanitizer. X-Mailer: Microsoft CDO for Exchange 2000 X-Sanitizer-URL: http://www.cs.earlham.edu/applied-groups/admin/ X-Sanitizer-Version: MIMEDefang/ECSanitizer $Revision: 1.18 $ X-Sanitizer-Config-Version: $Revision: 1.180 $ X-Scanned-By: MIMEDefang 2.51 on 159.28.230.3 X-Spam-Status: No, score=-2.8 required=8.0 tests=ALL_TRUSTED autolearn=failed version=3.0.3 X-Spam-Checker-Version: SpamAssassin 3.0.3 (2005-04-27) on quark.cs.earlham.edu X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Sender: Errors-To: owner-freebsd-questions@freebsd.org Content-Class: urn:content-classes:message X-Zen-Test-Spam-Score: 0 Importance: normal Priority: normal X-Zen-Test-Spam-Bar: (/) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.181 X-Originating-Schroedinger-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: hausdorff.zen.co.uk/1Dd8w4-0007ec-Te/2005-05-31 15:45:49 X-Antivirus: AVG for E-mail 7.0.323 [267.3.0] X-OriginalArrivalTime: 31 May 2005 15:45:50.0562 (UTC) FILETIME=[D2118C20:01C565F7] 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 15:46:11 -0000 This is a multi-part message in MIME format. --------------enig3DAFB34E835079E79DE17BB3 Content-Type: text/plain; format=flowed; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit 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/ --------------enig3DAFB34E835079E79DE17BB3 Content-Type: application/pgp-signature; name="signature.asc" Content-Transfer-Encoding: 7bit Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCnIZ8sc4yyULgN4YRAt74AJ9z2oHXVKIsnUj8g7IIDtQBjhV1QwCeOrFK TRhd7d4MbXi8b2qxX2b5+Bo= =wMiU -----END PGP SIGNATURE----- --------------enig3DAFB34E835079E79DE17BB3--