Re: KVM backup and snapshots

[Soren Hansen <soren@ubuntu.com>]

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On Thu, Aug 07, 2008 at 09:57:17AM -0500, Javier Guerra wrote:
>> I thought about using 1 lvm volume, but splitting that into slices
>> somehow, which can then be used as kvm disks - maybe by implementing
>> a very simple filesystem (block mapper). The problem with this
>> approach is that adding/deleting a new disk would mean to grow/shrink
>> an lvm partition, which is slow.
> you could run LVM in the VM.  be careful about block scanning tools on
> Dom0, could mistake the LVM structure inside a LV for the 'outer' one.
> (reiserfsck has this problem with image files)

Yes, I noticed that this is not common knowledge. Besides, it's
something that can't hurt being repeated every so often:

 * Don't ever, ever store images of reiser file systems on reiserfs!! *

Theodore T'so explained it rather well:

   http://linuxmafia.com/faq/Filesystems/reiserfs.html

-- 
Soren Hansen               | 
Virtualisation specialist  | Ubuntu Server Team
Canonical Ltd.             | http://www.ubuntu.com/

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