Re: [Xen-users] How was CoW implemented on the Demo LiveCD (3.0)

To:	Tim Deegan <Tim.Deegan@xxxxxxxxxxxx>
Subject:	Re: [Xen-users] How was CoW implemented on the Demo LiveCD (3.0) ??
From:	Anand <xen.mails@xxxxxxxxx>
Date:	Wed, 25 Jan 2006 16:30:39 +0530
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On 1/25/06, Tim Deegan <Tim.Deegan@xxxxxxxxxxxx> wrote:

On Wed, Jan 25, 2006 at 12:55:16AM +0530, Anand wrote:
> Can the same method of cow used in the LiveCD be implemented with LVM ?
> instead of the flat images ?

I've never tried it, but it should be possible to use the dmsetup runes
on any block device. In fact Andrew Peace's create_cow script from the
Xen3 demo CD does try to do the right thing if you give it a block
device instead of a file (i.e. not pass it through a loop device).

Don't the LVM tools provide a copy-on-write snapshot facility already?

LVM has snapshot features which are not stable. Seeing this post i thought if it was possible to use the same feature but with LVM instead of flat files.

--

regards,

Anand

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Re: [Xen-users] How was CoW implemented on the Demo LiveCD (3.0) ??