Date: Fri, 13 Dec 2002 13:07:18 -0500 From: "Simon" <simon@optinet.com> To: "Dan Nelson" <dnelson@allantgroup.com> Cc: "freebsd-isp@FreeBSD.org" <freebsd-isp@FreeBSD.ORG> Subject: Re: network backup Message-ID: <20021213180527.6B64543EA9@mx1.FreeBSD.org> In-Reply-To: <20021213165625.GB91604@dan.emsphone.com>
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I don't *just* want to make a backup. I want to back it up using an efficient method because I'm dealing with terabytes of data. I can't just back so much data daily over network and compress it. I have to do incremental backups and compression on the fly is a must to save disk space. I understand that rsync needs to be able to read local copy of the backup in order to sync files correctly, however, this can be done using on-fly compression, I just don't have/know the right tool. Tools like rar and zip can do this only locally and don't support large archive files; you have to break them up into many smaller ones, unless I missed something (i tried to zip/rar a lot of files and once the archive grew over gig or so in size, it errored out on me). Dump is a mess to work with, it doesn't work with directories nor with single archive file. You need to keep creating new dumps using different backup levels and I don't know how you will restore files for x user using all those little dumps when you need to efficiently. -Simon On Fri, 13 Dec 2002 10:56:25 -0600, Dan Nelson wrote: >In the last episode (Dec 13), Simon said: >> I have before I sent this email. And unless I misread it, -z is to >> compress on sending side to make rsync use less bandwidth in remote >> backups, not to compress data (on the fly) on the receiving (backup) >> end. > >rsync is for synchronizing two directories, and needs to be able to >read the files on both sides for the sync algorithm to work. If you >just want to back directories up, use tar, and add the 'z' flag to >compress the tarball. > >-- > Dan Nelson > dnelson@allantgroup.com > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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