From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Dean S. Messing" Subject: Backups w/ rsync (was: Help: very slow software RAID 5.) Date: Thu, 27 Sep 2007 15:10:49 -0700 (PDT) Message-ID: <20070927221049.19BE21023EB@medulla.enet.sharplabs.com> References: <20070918230914.9FF5910215F@medulla.enet.sharplabs.com> <20070919014919.DF19D10215F@medulla.enet.sharplabs.com> <20070919174956.9497310209D@medulla.enet.sharplabs.com> <46F292E2.1090700@tmr.com> <20070920184738.441FD10208C@medulla.enet.sharplabs.com> <46F2E159.9030806@msgid.tls.msk.ru> <20070921005851.44E8910236D@medulla.enet.sharplabs.com> <87r6knay66.fsf@informatik.uni-tuebingen.de> <20070925181618.82F47102162@medulla.enet.sharplabs.com> <87sl521kqh.fsf@informatik.uni-tuebingen.de> <20070925235016.02F6E1023B9@medulla.enet.sharplabs.com> <87k5qe19p0.fsf@informatik.uni-tuebingen.de> <20070927062317.3CCAB1023E0@medulla.enet.sharplabs.com> <46FB7D2A.1050608@ziu.info> Return-path: In-reply-to: <46FB7D2A.1050608@ziu.info> (message from Michal Soltys on Thu, 27 Sep 2007 11:51:38 +0200) Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Michal Soltys writes: : Dean S. Messing wrote: : > : > I don't see how one would do incrementals. My backup system uses : > currently does a monthly full backup, a weekly level 3 (which : > saves everything that has changed since the last level 3 a week ago) and : > daily level 5's (which save everything that changed today). : > : : Rsync is fantastic tool for incremental backups. Everything that didn't : change can be hardlinked to previous entry. And time of performing the : backup is pretty much neglible. Essentially - you have equivalent of : full backups at almost minimal time and space cost possible. It has been some time since I read the rsync man page. I see that there is (among the bazillion and one switches) a "--link-dest=DIR" switch which I suppose does what you describe. I'll have to experiment with this and think things through. Thanks, Michal. Dean P.S. I changed the Subject: to reflect the new subject. Not sure if that starts a new thread or not.