From owner-freebsd-questions@FreeBSD.ORG Mon Sep 24 21:42:35 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6809C16A469 for ; Mon, 24 Sep 2007 21:42:35 +0000 (UTC) (envelope-from lists@webtent.net) Received: from esmtp.webtent.net (esmtp.webtent.net [208.38.145.5]) by mx1.freebsd.org (Postfix) with ESMTP id 3FACD13C448 for ; Mon, 24 Sep 2007 21:42:35 +0000 (UTC) (envelope-from lists@webtent.net) Received: from localhost (localhost [127.0.0.1]) by esmtp.webtent.net (WebTent ESMTP Postfix Internet Mail Gateway) with ESMTP id A02007F514 for ; Mon, 24 Sep 2007 17:42:34 -0400 (EDT) Received: from esmtp.webtent.net ([127.0.0.1]) by localhost (mx1.webtent.net [127.0.0.1]) (amavisd-maia, port 10024) with ESMTP id 48983-06 for ; Mon, 24 Sep 2007 17:42:08 -0400 (EDT) Received: from [70.110.70.43] (columbus.webtent.org [70.110.70.43]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by esmtp.webtent.net (WebTent ESMTP Postfix Internet Mail Gateway) with ESMTP id 4933B7F555 for ; Mon, 24 Sep 2007 17:42:08 -0400 (EDT) From: Robert Fitzpatrick To: FreeBSD Content-Type: text/plain Organization: WebTent Networking, Inc. Date: Mon, 24 Sep 2007 17:42:05 -0400 Message-Id: <1190670125.6474.14.camel@columbus.webtent.org> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit X-Virus-Scanned: WebTent Mailguard 1.0.2a Subject: snapshots X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: robert@webtent.com List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 24 Sep 2007 21:42:35 -0000 I was looking into snapshots using the doc below to try and see if delta copies with rsync matched data better if I take a snapshot of a file system, mount it and rsync transfer the data. Right now, dumps don't seem to match much data due to changes in the sequences and a very active mail cache pgsql db. http://people.freebsd.org/~rse/snapshot/ I created the snapshot and got it mounted, took a minute or so for each to do this on my /usr ufs file system on FreeBSD 6.2 with 2GB RAM, dual P4 procs with SMP and RAID 5 (I know, will be changing soon) SATA150 drives. In the midst of doing this, the currently running pgsql db, remember I said it was very active amavisd-maia supporting two mail gateways as a mail cache if you know Maia Mailguard, I started getting these messages and things stopped responding well... Sep 24 16:59:02 mx1 kernel: aac0: COMMAND 0xc6530fc0 TIMEOUT AFTER 38 SECONDS Did a reboot, it tooks several minutes to start reboot after the command. I even got some of these kernel messages after the reboot, not until I rm -f the snapshot file did it stop. I am wondering how I need to handle snapshots when trying this, especially if included in a routine backup script? I haven't made it to the solution part of the above doc yet, wanted to check here before I try anything again. Also, haven't tested my rsync until tonight to see if the file system transfer will make a difference in my ability to match data better. But I'd still like use the snapshot as a backup solution. -- Robert