[lug] Backup system ideas
jafo at tummy.com
Sat May 21 12:00:04 MDT 2005
On Fri, May 20, 2005 at 03:24:27PM -0600, Nate Duehr wrote:
>I decided to give dirvish a whirl (pun intended!) on a couple of home
>machines just to see how it did, and I'm impressed.
Yeah, I hadn't seen it before either. I'm using rsync to back up a bunch
of systems using a few simple scripts. I basically keep incremental data
using "--backup-dir ../incrementals/daily-YYYY-MM-DD --backup", and use
some simple scripts to merge dailies into weeklies and monthlies. I also
use a massive "find" command after every backup to write out a list of
files that were a part of the current backup including inode numbers in
case a historic copy has to be recovered later.
This works really well for recovering the current copy (in the event of a
disaster), or recovering a particular historic version of a file.
Recovering the full system to a few weeks ago is more difficult, as it
requires corelating the "find" information to get the historic data from
across possibly multiple directories. However, that is a very rare
occurance in my environment. I can't think of a time in the last decade
I've wanted to do that.
The "cp -al" of the full image before running the backup is an interesting
idea, but it really hammers the file-system. That way to have a full copy
of the file-system, without using a fully copy worth of space.
The most important thing in communication is to hear what isn't being said.
-- Peter Drucker
Sean Reifschneider, Member of Technical Staff <jafo at tummy.com>
tummy.com, ltd. - Linux Consulting since 1995: Ask me about High Availability
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