From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bastian de Groot <degroot@univention.de>
Subject: Re: large overhead with blktap2/vhd
Date: Thu, 24 Jun 2010 13:15:21 +0200
Message-ID: <201006241315.21498.degroot@univention.de>
References: <201006231726.06620.degroot@univention.de>
	<201006241041.30901.csamsel@gmxpro.de>
Mime-Version: 1.0
Content-Type: Text/Plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <201006241041.30901.csamsel@gmxpro.de>
Content-Disposition: inline
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: xen-devel@lists.xensource.com
Cc: Christian Samsel <csamsel@gmxpro.de>
List-Id: xen-devel@lists.xenproject.org



Am Donnerstag 24 Juni 2010 10:41:30 schrieben Sie:
> Am Mittwoch, 23. Juni 2010, 17:26:05 schrieb Bastian de Groot:
> > Hi everybody,
> >
> > I am searching for a copy-on-write solution for Xen and tested blktap2
> > with the vhd backend.
> >
> > My Test:
> >
> > I've created a master-image with "dd" and installed WindowsXP on the
> > image. Then I used vhd-util to create a copy-on-write-image for the
> > master-image.
> >
> > After booting the VM and logging in the, the cow-image had a size of 260
> > MB. That's a little bit weird, because I didn't really changend any data.
>
> Just one word: swap.
>
> Christian

Good guess! I've tested it with deactivated swap in WindowsXP, but it didn't 
have any effect. The results were the same.

Bastian