From owner-freebsd-hackers@FreeBSD.ORG Wed Oct 8 08:14:59 2008 Return-Path: Delivered-To: hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6DFC2106568C for ; Wed, 8 Oct 2008 08:14:59 +0000 (UTC) (envelope-from des@des.no) Received: from tim.des.no (tim.des.no [194.63.250.121]) by mx1.freebsd.org (Postfix) with ESMTP id 262058FC1F for ; Wed, 8 Oct 2008 08:14:59 +0000 (UTC) (envelope-from des@des.no) Received: from ds4.des.no (des.no [84.49.246.2]) by smtp.des.no (Postfix) with ESMTP id 480992083; Wed, 8 Oct 2008 10:14:58 +0200 (CEST) Received: by ds4.des.no (Postfix, from userid 1001) id 23DC4844BA; Wed, 8 Oct 2008 10:14:58 +0200 (CEST) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: "Zaphod Beeblebrox" References: <48E9E1BB.6020908@ispro.net> <48EA56BB.6040702@vwsoft.com> <48EA8B3A.3090609@ispro.net> <861vysiv9i.fsf@ds4.des.no> <5f67a8c40810070937r5ba89773ncee407ace25fa0dd@mail.gmail.com> Date: Wed, 08 Oct 2008 10:14:58 +0200 In-Reply-To: <5f67a8c40810070937r5ba89773ncee407ace25fa0dd@mail.gmail.com> (Zaphod Beeblebrox's message of "Tue, 7 Oct 2008 12:37:37 -0400") Message-ID: <86iqs3sdtp.fsf@ds4.des.no> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: Volker , Evren Yurtesen , 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: Wed, 08 Oct 2008 08:14:59 -0000 "Zaphod Beeblebrox" writes: > "Dag-Erling Sm=C3=B8rgrav" writes: > > What really annoys me with this thread is that nobody has provided > > any information at all that would allow someone to understand what > > needs to be done and estimate how hard it would be. > Well... I hinted that a hammer port would be sufficient (although they > need to finish their replication design) and I hinted that the hammer > approach may be graftable to ZFS. Both reasonably large effort-wise > (but probably within the scope of a single developer with sufficient > time). No... you're so far off the mark it's not even funny, especially when it's been repeatedly pointed out to you. This is not a file system, it's a backup system. It's not designed to survive a disk crash or an accidental file deletion, it's designed to survive a direct missile strike on your colo center. To quote Wikipedia, "CDP is a service that captures changes to data to a separate storage location" - emphasis on "separate". DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no