[ale] LVM anyone?

[Danny Cox]

Jim,

On Mon, 2003-03-03 at 07:22, Jim Popovitch wrote:
> Thanks Keith.  Do you know if LVM reqires any RAID components (/dev/md?) or
> other special devices in order to do mirroring.

	As Keith noted, LVM only does striping, but isn't fault tolerant.  It
*does* offer one thing more, though: snapshots.  It's kinda crufty, and
sometimes doesn't work properly with the fs (some, like XFS have a
free/thaw API that's useful in this case).

	The idea is: take a snapshot, which is an fs "frozen in time".  Mount
that read-only, and take a backup of it.  Then discard the snapshot. 
There ya go, a backup without files changing underneath, and the regular
folks can continue to work (or at least surf).

-- 
kernel, n.: A part of an operating system that preserves the
medieval traditions of sorcery and black art.

Danny

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