Disc based backups, snapshots, syncing (was Re: [tech] the aftermath)
nick at ucc.gu.uwa.edu.au
Sat Nov 15 11:17:26 WST 2003
On Sat, Nov 15, 2003 at 03:02:11AM +1100, David Luyer wrote:
> Has anyone done copy-on-write snapshots for Linux or *BSD?
> (most SANs do them, but I can't think of a Unix FS which does)
There's a few options - Linux LVM of course, at the block layer.
At the FS layer, there's BSD Union FS and
http://translucency.sourceforge.net/ , or a few other/older approaches
at the same thing.
User-Mode-Linux can, which would be quite a neat solution.
Then there's a bunch of disc-based backup systems. These would indeed
match a removable Firewire disc or something - I _do_ think they'd be
worth getting a nice big one (a dual drive LaCie?) and using
exclusively for backups:
And a few syncing-type links for luck:
How to do a consistent mirror, using sequence files:
apt-cache show unison
RAID over NBD/ENBD/iSCSI/HyperSCSI?
It would of course be wonderful to pick up a secondhand NetApp filer,
in a complete and operational state. They keep getting put on ebay for
stupidly high prices, and... not selling.
Nick Bannon | "I made this letter longer than usual because
nick-sig at rcpt.to | I lack the time to make it shorter." - Pascal
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