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Re: [Xen-users] Backup solution

  • To: Artur Linhart <Artur.Linhart@xxxxxxxxxxx>
  • From: Nico Kadel-Garcia <nkadel@xxxxxxxxx>
  • Date: Tue, 10 Jul 2007 18:24:25 +0100
  • Cc: 'xen-users' <Xen-users@xxxxxxxxxxxxxxxxxxx>, "'Fajar A. Nugraha'" <fajar@xxxxxxxxxxxxx>
  • Delivery-date: Tue, 10 Jul 2007 10:22:05 -0700
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Artur Linhart wrote:
OK, but - if You create the LVM snapshot volume and make the backup of it,
You assume the OS running in VM has written everything correctly to the
logical volume and the logical volume is in consistent state. But this assumption seems to be dangerous for me, especially by Windows DomU
- how can You be sure, the OS hdd driver has written everything to the
logical volume before You create the snapshot volume?

I would like also to use the LVM snapshots for backup, but this topic is a
problem for me, which I could not solve yet...

        With regards

Windows snapshot backups are a serious, serious problem. Complex software plays enormously complex games to provide this.

Frankly, the most reliable is to actually shut down the machine, *then* take an LVM snapshot, then reboot it to keep service active wile using the LVM snapshot for backup. Not pause: not suspend: *halt* the thing.

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