Date: Mon, 06 Oct 2008 11:49:33 -0700 From: Bakul Shah <bakul@bitblocks.com> To: "Vlad GALU" <dudu@dudu.ro> Cc: Evren Yurtesen <yurtesen@ispro.net>, hackers@freebsd.org Subject: Re: continuous backup solution for FreeBSD Message-ID: <20081006184934.04A645B4C@mail.bitblocks.com> In-Reply-To: Your message of "Mon, 06 Oct 2008 18:09:06 %2B0300." <ad79ad6b0810060809s7772db5icc140a19d59b2087@mail.gmail.com> References: <48E9E1BB.6020908@ispro.net> <001AD718-D25B-421B-8B0F-CE71FA5A7CF0@gid.co.uk> <48EA21AE.80607@ispro.net> <ad79ad6b0810060809s7772db5icc140a19d59b2087@mail.gmail.com>
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On Mon, 06 Oct 2008 18:09:06 +0300 "Vlad GALU" <dudu@dudu.ro> wrote: > On Mon, Oct 6, 2008 at 5:33 PM, Evren Yurtesen <yurtesen@ispro.net> wrote: > > Bob Bishop wrote: > > > >>> Does anybody have free time and skills to give a hand? Please see: > >>> http://forum.r1soft.com/showpost.php?p=3414&postcount=9 > >> > >> Should be possible to do this with a geom(4) class? > >> > > > > I am not saying it is impossible. They just need somebody to put them to > > right track I guess. I personally cant do that. It would be nice if somebod > y > > who has knowledge in this area contacts r1soft. At the very least r1soft > > seems to be willing to communicate on this issue. > > > > Continuous backups as well as bare-metal-restore seem to be a key feature > > for many hosters. FreeBSD is loosing users because of this issue. > > gmirror+ggate come to mind as a nifty solution ... My guess is these guys do something simpler like keep keep track of changed blocks since the last backup and periodically dump those blocks to a server. This is good enough for backups (but not mirroring) and it has low memory overhead (1 or 2 bits per block), lower network overhead than remote mirroring (you send a block at most once every sync interval), and a tiny loss of performance (over no backups). May be someone ought to do a garchive device!
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