From owner-freebsd-hackers@FreeBSD.ORG Tue Oct 7 16:25:21 2008 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E9A12106568B for ; Tue, 7 Oct 2008 16:25:21 +0000 (UTC) (envelope-from shaun@FreeBSD.org) Received: from dione.picobyte.net (81-86-230-94.dsl.pipex.com [81.86.230.94]) by mx1.freebsd.org (Postfix) with SMTP id 69DC78FC17 for ; Tue, 7 Oct 2008 16:25:21 +0000 (UTC) (envelope-from shaun@FreeBSD.org) Received: from charon.picobyte.net (charon.picobyte.net [IPv6:2001:770:15d::fe03]) by dione.picobyte.net (Postfix) with ESMTP id 51DC4B878; Tue, 7 Oct 2008 16:51:00 +0100 (BST) Date: Tue, 7 Oct 2008 16:50:59 +0100 From: Shaun Amott To: Evren Yurtesen Message-ID: <20081007155059.GA20615@charon.picobyte.net> References: <48E9E1BB.6020908@ispro.net> <48EA3451.7040801@miralink.com> <48EA83CE.4060702@ispro.net> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <48EA83CE.4060702@ispro.net> User-Agent: Mutt/1.5.16 (FreeBSD i386) Cc: Sean Bruno , freebsd-hackers@freebsd.org Subject: Re: continuous backup solution for FreeBSD X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 07 Oct 2008 16:25:22 -0000 On Tue, Oct 07, 2008 at 12:31:58AM +0300, Evren Yurtesen wrote: > > so FreeBSD could be supported also. As you can imagine, it is not only > important that data can be restored when a box hardware failure etc. it is > also important that data can be restored if deleted by accidents etc. While > traditional backup programs provide this functionality, you cant really go > back to 10 min or 1h ago, often they take daily backups and have to scan > whole filesystem for changed files every time the backup is taken which > stresses out the systems. > This can (more or less) be achieved with snapshots: you can cheaply maintain old versions of the file system, and mount an old snapshot at any time. Hourly is about as fine-grained as you can expect though. -- Shaun Amott // PGP: 0x6B387A9A "A foolish consistency is the hobgoblin of little minds." - Ralph Waldo Emerson