From: Sylvain Bauza <sylvain.bauza@digimind.com>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: Win2003 disk corruption with kvm-1.0. and virtio
Date: Thu, 14 Feb 2013 11:11:33 +0100 [thread overview]
Message-ID: <511CB855.9090803@digimind.com> (raw)
In-Reply-To: <20130214081543.GA3809@stefanha-thinkpad.redhat.com>
Interesting point you mention. Even if qcow2 is read only, the image is
changing (especially, I'm running IIS with ASP support and VB DLLs)
while the snapshot is taken.
As asked in a second post, I'm running with latest Windows virtio
drivers, but I only apply a virtio driver update *after* running an
instance, not before taking the snapshot.
What I'll try : run an instance, update the driver, stop the instance,
do a qemu-img convert once the instance is stopped.
Le 14/02/2013 09:15, Stefan Hajnoczi a écrit :
> On Wed, Feb 13, 2013 at 10:53:14AM +0100, Sylvain Bauza wrote:
>> As per documentation, Nova (Openstack Compute layer) is doing a
>> 'qemu-img convert -s' against a running instance.
>> http://docs.openstack.org/trunk/openstack-compute/admin/content/creating-images-from-running-instances.html
> That command will not corrupt the running instance because it opens the
> image read-only.
>
> It is possible that the new image is corrupted since qemu-img is reading
> from a qcow2 file that is changing underneath it. However, the chance
> is small as long as the snapshot isn't deleted while qemu-img convert is
> running.
>
> So this doesn't sound like the cause of the problems you are seeing.
>
> Stefan
next prev parent reply other threads:[~2013-02-14 10:11 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-12 14:30 Win2003 disk corruption with kvm-1.0. and virtio Sylvain Bauza
2013-02-13 7:21 ` Philipp Hahn
2013-02-13 9:56 ` Sylvain Bauza
2013-02-13 16:03 ` weber
2013-02-14 5:27 ` Michael Tokarev
2013-02-14 8:23 ` Sylvain Bauza
2013-02-13 9:03 ` Stefan Hajnoczi
2013-02-13 9:53 ` Sylvain Bauza
2013-02-14 8:15 ` Stefan Hajnoczi
2013-02-14 10:11 ` Sylvain Bauza [this message]
2013-03-12 15:48 ` Sylvain Bauza
2013-03-12 21:10 ` Jorge Armando Medina
2013-02-14 8:17 ` Stefan Hajnoczi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=511CB855.9090803@digimind.com \
--to=sylvain.bauza@digimind.com \
--cc=kvm@vger.kernel.org \
--cc=stefanha@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox