Re: [Xen-users] Xen backups using LVM Snapshots

[Lists <lists@xxxxxxxxxxxxx>]

Thanks Javier.  I might end up installing an online backup client on each DomU. 
 I'll also have a good look at rsnapshot.  I used rsync extensively a few years 
back to make online backups.

Thanks for your advice.
 -eco


----- Original Message -----
From: "Javier Guerra" <javier@xxxxxxxxxxx>
To: lists@xxxxxxxxxxxxx
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Sent: Wednesday, October 15, 2008 3:55:13 PM GMT +01:00 Amsterdam / Berlin / 
Bern / Rome / Stockholm / Vienna
Subject: Re: [Xen-users] Xen backups using LVM Snapshots

On Wed, Oct 15, 2008 at 2:17 AM,  <lists@xxxxxxxxxxxxx> wrote:
> Each DomU with a database has a cron that dumps the db with mysqldump.  Later 
> on, Dom0 will do an LVM Snapshot of all DomUs and then do a file system 
> backup of the Snapshots.  I do no actions on the DomUs.  No shutdown or 'xm 
> pause/save/...'


as you must have seen already, those snapshots mount as 'dirty'
filesystems, since they're exact copies of an already mounted
filesystem.  therefore, you have to run fsck on mount (usually
automatic on journalling filesystems).  depending on the journalling
algorithm, you risk having non-written data.

much safer, and easier IMHO, is to do a regular network backup.
something as simple as pulling via rsync the files you need.  (i
really like rsnapshot)

-- 
Javier

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