From owner-freebsd-fs@FreeBSD.ORG Mon Mar 22 16:34:28 2004 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 500C316A4CE for ; Mon, 22 Mar 2004 16:34:28 -0800 (PST) Received: from zardoc.esmtp.org (adsl-63-195-85-27.dsl.snfc21.pacbell.net [63.195.85.27]) by mx1.FreeBSD.org (Postfix) with ESMTP id E7A8543D2D for ; Mon, 22 Mar 2004 16:34:27 -0800 (PST) (envelope-from ca+envelope@esmtp.org) Received: from zardoc.esmtp.org ([127.0.0.1]) by zardoc.esmtp.org (sendmail 9.0.0.PreAlpha12) with ESMTP id S00000000404775DB01; Mon, 22 Mar 2004 16:35:57 -0800 Received: (from ca@localhost)i2N0Zun5026306 for freebsd-fs@freebsd.org; Mon, 22 Mar 2004 16:35:56 -0800 (PST) Date: Mon, 22 Mar 2004 16:35:56 -0800 From: Claus Assmann To: freebsd-fs@freebsd.org Message-ID: <20040323003556.GA22741@zardoc.esmtp.org> References: <20040317060617.GA23526@zardoc.esmtp.org> <20040319221643.GA90277@dan.emsphone.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040319221643.GA90277@dan.emsphone.com> User-Agent: Mutt/1.5.6i Subject: Re: softupdates and two different MTAs X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Mar 2004 00:34:28 -0000 On Fri, Mar 19, 2004, Dan Nelson wrote: > In the last episode (Mar 16), Claus Assmann said: > > | program | FS | writes | reads | > > |---------------+------------------+---------+-------| > > | sm8.12.11 | UFS, softupdates | 236 | 0 | > > | sm9.0.0.12 | UFS, softupdates | 3500 | 4 | > So something is either not fsyncing, or there is clustering going on > behind the scenes. The sm8 softupdates count is disturbingly low, even > assuming good clustering. You are right, it is too low. After following your advice about adding the disk I/O stats to sendmail 8 itself, I finally found that the cf file had SuperSafe=m, which causes it to not issue most of the fsync(2) calls. With SuperSafe=true sm8 uses about twice as many disk writes as sm9 and hence the latter is about two times faster than the former. Thanks for your reply! From owner-freebsd-fs@FreeBSD.ORG Thu Mar 25 10:18:41 2004 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F14B416A4CE for ; Thu, 25 Mar 2004 10:18:41 -0800 (PST) Received: from smtp2.completel.net (smtp2.completel.net [195.167.195.197]) by mx1.FreeBSD.org (Postfix) with ESMTP id E7E9743D39 for ; Thu, 25 Mar 2004 10:18:40 -0800 (PST) (envelope-from momtchil.momtchev@netasq.com) Received: from smtp.netasq.com (netasq.netasq.com [213.30.137.178] (may be forged)) by smtp2.completel.net (8.12.8/8.12.8) with ESMTP id i2PIIm9q010597 for ; Thu, 25 Mar 2004 19:18:48 +0100 From: Momtchil Momtchev Organization: NETASQ To: freebsd-fs@freebsd.org Date: Thu, 25 Mar 2004 19:19:08 +0000 User-Agent: KMail/1.6.1 MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message-Id: <200403251919.08564.momtchil.momtchev@netasq.com> Subject: Problem (potential bug) in the vnode disk driver, stable branch X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Mar 2004 18:18:42 -0000 Hello, We've stumbled on what appears to be a bug in the vnode disk driver. It=20 happens rarely and we aren't able to reproduce it atm, but we've seen it=20 already a few times on different kernels, compiled with different options. If you can read russian, there's also a brief description of what appears = to=20 be exactly the same problem at=20 http://www.j2.ru/frozenfido/ru.unix.bsd/89061df31001.html. Theirs is on=20 =46reeBSD 4.3, we are running FreeBSD 4.9. What happens is that after mounting a file as a filesystem through the vn= =20 driver, everything will run fine, then eventually (after a few days, weeks = or=20 even months) the filesystem is going to get "disconnected" in a strange way= =20 with every attempt to access it returning an I/O error. vnconfig will report "device not configured": #/usr/sbin/vnconfig -c /dev/vn0c /somefile vnconfig: /dev/vn0c: Device not configured #vnconfig -u /dev/vn0c vnconfig: /dev/vn0c: Device not configured umount/mount will fail too. We are still trying to find a way to reliably reproduce the problem in ord= er=20 to fill a standard bug report. ATM we don't have any idea what could trigger it. The main problem is that it happens very rarely and we can't really afford= to=20 run a kernel with all the debugging enabled on thousands of hosts (to catch= =20 the few which will crash). Anyone seen this before? Any comments will be appreciated. =2D- Momtchil Momtchev, R&D Engineer Netasq - Secure Internet Connectivity http://www.netasq.com T=E9l : +33 320 619 630 =46ax : +33 320 619 639 From owner-freebsd-fs@FreeBSD.ORG Thu Mar 25 13:22:19 2004 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 80EAA16A4CE for ; Thu, 25 Mar 2004 13:22:19 -0800 (PST) Received: from web40808.mail.yahoo.com (web40808.mail.yahoo.com [66.218.78.185]) by mx1.FreeBSD.org (Postfix) with SMTP id 508BA43D41 for ; Thu, 25 Mar 2004 13:22:19 -0800 (PST) (envelope-from gustavofukao@yahoo.com) Message-ID: <20040325212218.23970.qmail@web40808.mail.yahoo.com> Received: from [200.153.166.7] by web40808.mail.yahoo.com via HTTP; Thu, 25 Mar 2004 13:22:18 PST Date: Thu, 25 Mar 2004 13:22:18 -0800 (PST) From: Gustavo Fukao To: freebsd-fs@freebsd.org In-Reply-To: <20040325200127.67D9C16A4D1@hub.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Content-Filtered-By: Mailman/MimeDel 2.1.1 Subject: GFS X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Mar 2004 21:22:19 -0000 Is there in FreeBSD a fs like gfs... to distribuided systems?? Gustavo Fukao FreeBSD user http://www.freebsd-br.cjb.net --------------------------------- Do you Yahoo!? Yahoo! Finance Tax Center - File online. File on time.