From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 4B45115815E for ; Sat, 3 Feb 2024 16:02:23 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 36B1B2BC033; Sat, 3 Feb 2024 16:02:16 +0000 (UTC) Received: from ciao.gmane.io (ciao.gmane.io [116.202.254.214]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id D5B082BC029 for ; Sat, 3 Feb 2024 16:02:15 +0000 (UTC) Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1rWIT8-0004vl-Ac for gentoo-user@lists.gentoo.org; Sat, 03 Feb 2024 17:02:14 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: gentoo-user@lists.gentoo.org From: Grant Edwards Subject: [gentoo-user] Re: Suggestions for backup scheme? Date: Sat, 3 Feb 2024 16:02:10 -0000 (UTC) Message-ID: References: <8f5371a5-07af-456e-8517-cb9bb664fac4@youngman.org.uk> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit User-Agent: slrn/1.0.3 (Linux) X-Archives-Salt: 376bc382-5e59-460d-b717-ad7830b351ce X-Archives-Hash: d5c1705e7e6f3a232d5fa48ef43152ca On 2024-02-02, Mark Knecht wrote: > On Fri, Feb 2, 2024 at 4:39 PM Grant Edwards > wrote: > >> >> I googled for ZFS backup applications, but didn't find anything that >> seemed to be widespread and "supported" the way that rsnapshot is. > > I'm not exactly sure I'm following your thoughts above but rsnapshot is an application that uses rsync to do hourly/daily/weekly/monthly (user-configurable) backups of selected directory trees. It's done using rsync to create snapshots. They are in-effect "incremental" backups, because the snapshots themselves are effectively "copy-on-write" via clever use of hard-links by rsync. A year's worth of backups for me is 7 daily + 4 weekly + 12 monthly snapshots for a total of 23 snapshots. If nothing has changed during the year, those 23 snapshots take up the same amount of space as a single snapshot. My understanding of ZFS is that it has built-in snapshot functionality that provides something similar to what is done by rsync by its use of hard-links. In my current setup, there's an application called rsnapshot that manages/controls the snapshots by invoking rsync in various ways. My question was about the existence of a similar application that can be used with ZFS's built-in snapshot support to provide a similar backup scheme. > have you investigated True-NAS? It is Open ZFS based and > does support snapshots. I'm aware of True-NAS, but I'm not looking for NAS. I was asking abouth methods to backup one local disk to another local disk. -- Grant