From owner-freebsd-stable@FreeBSD.ORG Mon Dec 1 08:32:35 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EA667106564A; Mon, 1 Dec 2008 08:32:35 +0000 (UTC) (envelope-from gerrit@pmp.uni-hannover.de) Received: from mrelay1.uni-hannover.de (mrelay1.uni-hannover.de [130.75.2.106]) by mx1.freebsd.org (Postfix) with ESMTP id 4CC068FC0C; Mon, 1 Dec 2008 08:32:35 +0000 (UTC) (envelope-from gerrit@pmp.uni-hannover.de) Received: from www.pmp.uni-hannover.de (www.pmp.uni-hannover.de [130.75.117.2]) by mrelay1.uni-hannover.de (8.14.2/8.14.2) with ESMTP id mB18WWWX030114; Mon, 1 Dec 2008 09:32:33 +0100 Received: from pmp.uni-hannover.de (arc.pmp.uni-hannover.de [130.75.117.1]) by www.pmp.uni-hannover.de (Postfix) with SMTP id 1568672; Mon, 1 Dec 2008 09:32:32 +0100 (CET) Date: Mon, 1 Dec 2008 09:32:32 +0100 From: Gerrit =?ISO-8859-1?Q?K=FChn?= To: pjd@freebsd.org Message-Id: <20081201093232.59394eec.gerrit@pmp.uni-hannover.de> In-Reply-To: References: <20081130000059.GC1494@garage.freebsd.pl> Organization: Albert-Einstein-Institut (MPI =?ISO-8859-1?Q?f=FCr?= Gravitationsphysik & IGP =?ISO-8859-1?Q?Universit=E4t?= Hannover) X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.11; i386-portbld-freebsd7.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-PMX-Version: 5.4.1.325704, Antispam-Engine: 2.6.0.325393, Antispam-Data: 2008.12.1.82242 Cc: freebsd-stable@freebsd.org, Pete French Subject: Re: Curious failure of ZFS snapshots X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 01 Dec 2008 08:32:36 -0000 On Sun, 30 Nov 2008 01:05:48 +0000 Pete French wrote about Re: Curious failure of ZFS snapshots: PF> Here is what I am doing - this script is run with an argument '7am' or PF> '7pm' once per day. the mysql database is a slave replication from a PF> master, so there is a continuous trickle of data into it. The symbolic PF> links are there so you can connect to the mysql server and access PF> 'xxx-7am' or 'xxx-7pm' to get a previous version of database 'xxx'. PF> In case its not obvious, the filesystem 'tank/zfs' is mounted on the PF> director '/var/db/mysql'. If you run this for a few cycles it should PF> preseumably break for you too. If you think it will be useful I can also post my scripts. However, as I did not see the problem again so far, it might be the case that I messed something up manually while developing the scripts one or two weeks ago. As mentioned, even the unaccessible zfs snapshots did send/receive fine, so internally zfs seems to be happy (only unmounting them was a bad idea :-). cu Gerrit