From owner-freebsd-questions@FreeBSD.ORG Sat Mar 9 22:50:05 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 9FF60565 for ; Sat, 9 Mar 2013 22:50:05 +0000 (UTC) (envelope-from gkeramidas@gmail.com) Received: from mail-ea0-x236.google.com (mail-ea0-x236.google.com [IPv6:2a00:1450:4013:c01::236]) by mx1.freebsd.org (Postfix) with ESMTP id 3F604E21 for ; Sat, 9 Mar 2013 22:50:05 +0000 (UTC) Received: by mail-ea0-f182.google.com with SMTP id q15so669244ead.13 for ; Sat, 09 Mar 2013 14:50:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:sender:from:to:cc:subject:references:date:in-reply-to :message-id:user-agent:mime-version:content-type; bh=LhgEKRGgLSaEDNxwCs6LPiFbwKQyvmk7JEwrMjEjmW0=; b=h09UR46NyxO+baplfhcJZdcxBANyeL+Wgm5vtZrU18HKYQ/c0WeSQhuL55Dro4oQoY FDg143domgw4ZhinWFxVBhqpleD6C7+boeTWPD9yBR1qAskQwsiqRfP8yikDMOtJ4HUQ FMTfpTC+w4EcmX/u2RbziQi7ot0a2cCbX/VLVZ4N9yaZ94rZLvnNmQNshKEC42anz2fA nI9fFMVKCcZpk1VwB7k8s1fw4WfCUIsSQcaqsyMCSXJPbH5ORttZO4oZnSJYelVu6LHA aoWU+oms3elsNiWzIrjiBsBlln1j5dVs6MljJIsg75j5BmQxhfQUJECIi1l40tMRNwx3 hbvw== X-Received: by 10.14.3.133 with SMTP id 5mr19917177eeh.43.1362869404415; Sat, 09 Mar 2013 14:50:04 -0800 (PST) Received: from saturn.gmail.com (217-162-217-29.dynamic.hispeed.ch. [217.162.217.29]) by mx.google.com with ESMTPS id ca4sm11624402eeb.15.2013.03.09.14.50.02 (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Sat, 09 Mar 2013 14:50:03 -0800 (PST) Sender: Giorgos Keramidas From: Giorgos Keramidas To: Matthias Petermann Subject: Re: backups using rsync References: <6126.1362396930@server1.tristatelogic.com> <20130305160021.GA9376@saturn> <20130305203022.Horde.dksye196oEwlUQ41iOTg2Q9@d2ux.org> Date: Sat, 09 Mar 2013 23:49:59 +0100 In-Reply-To: <20130305203022.Horde.dksye196oEwlUQ41iOTg2Q9@d2ux.org> (Matthias Petermann's message of "Tue, 05 Mar 2013 20:30:22 +0100") Message-ID: <87vc902noo.fsf@kobe.laptop> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Cc: freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 09 Mar 2013 22:50:05 -0000 On Tue, 05 Mar 2013 20:30:22 +0100, Matthias Petermann wrote: > Hello, > Zitat von Giorgos Keramidas : > >> If this is a UFS2 filesystem, it may be a good idea to snapshot the >> filesystem, and then rsync-backup the snapshot instead. > > Last time I tried UFS2 snapshots I found out two serious limitations. > The first is it doesn't work when UFS Journaling is used. The second is > that taking a snapshop on a large filesystem can cause parts of the > system to freeze for many minutes up to hours when accessing files > part of the snapshot, depending on the size of the filesystem. > That's why I could not use it on my server with > 1TB UFS2. > > Did this improve in the last year? (I guess my experience is from the > time around 9.0 release). Hi Matthias, Unfortunately I don't know if snapshots for such large filesystems are faster now. I've only used UFS2 snapshots in about 10x times smaller filesystems here.