From owner-freebsd-isp Wed Sep 18 15:56:28 1996 Return-Path: owner-isp Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id PAA09492 for isp-outgoing; Wed, 18 Sep 1996 15:56:28 -0700 (PDT) Received: from salsa.gv.ssi1.com (salsa.gv.ssi1.com [146.252.44.194]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id PAA09463 for ; Wed, 18 Sep 1996 15:56:22 -0700 (PDT) Received: (from gdonl@localhost) by salsa.gv.ssi1.com (8.7.5/8.7.3) id PAA10710; Wed, 18 Sep 1996 15:56:03 -0700 (PDT) From: Don Lewis Message-Id: <199609182256.PAA10710@salsa.gv.ssi1.com> Date: Wed, 18 Sep 1996 15:56:03 -0700 In-Reply-To: Matt Hamilton "Re: Backup strategies" (Sep 18, 5:19pm) X-Mailer: Mail User's Shell (7.2.6 alpha(3) 7/19/95) To: Matt Hamilton , Branson Matheson Subject: Re: Backup strategies Cc: freebsd-isp@FreeBSD.ORG Sender: owner-isp@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Sep 18, 5:19pm, Matt Hamilton wrote: } Subject: Re: Backup strategies } On Wed, 18 Sep 1996, Branson Matheson wrote: } } > Hmmm.. mabey you don't understand how amanda works... it will do a } > complete level 0 once per dumpcycle and the rest of the time it will } > do incrementals... that means that you _can_ restore using the full } } So does it do incrementals from the last level 0 dump or from the last } incremental ie. if I do a level 0 on Monday and incrementals tue, wed, } thu, fri and it crashes friday do I need tapes Monday and Friday or tapes } Mon, tue, wed,thu, fri? It always does at least two backups in a row at each incremental level, and only goes on to the next incremental level if it determines that this will reduce the amount of data backed up by a "sufficient" amount. If a lot of data is modified each day, the backup schedule will look like: 0 1 1 2 2 3 3 If the disk is mostly static, the schedule will look like: 0 1 1 1 1 1 1 If you need to do a complete restore, run "amadmin config find host disk" which will tell you what backups are stored on each tape, then restore the latest level 0, and the latest incremental at each level that is newer than the level 0. --- Truck