From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Tue, 9 Oct 2001 08:47:17 +0100
Subject: Re: [linux-lvm] LVM metsdata
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In-Reply-To: <20011008204254.19061.qmail@web20201.mail.yahoo.com>; from leegotze@yahoo.com on Mon, Oct 08, 2001 at 01:42:54PM -0700
From: Joe Thornber <thornber@btconnect.com>
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On Mon, Oct 08, 2001 at 01:42:54PM -0700, Lee Go-Tze wrote:
> I have a novice question.  How does the LVM 
> protect its metadata.  I mean does it do some 
> sort of metadata check when machine comes up 
> (notices the system did not shutdown properly)?
> Or maybe it uses journaling? I imagine the 
> updates to lv/vg/pv structures have to be 
> transactional.

Transactional updates will go into LVM after mid November.  Checksums
for the metadata will also go in at this point.  ATM problems are
spotted by consistency checks (the is a lot of duplication between the
pv's).  If a problem is spotted the administrator can restore from the
automatic metadata backups.

- Joe