From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] qcow2: online snasphots : internal vs external ?
Date: Mon, 27 Aug 2012 12:10:34 +0200 [thread overview]
Message-ID: <k1fh2q$itj$1@ger.gmane.org> (raw)
In-Reply-To: <7e7d4bb6-17ab-439b-8ec5-2e4a6a98269d@mailpro>
Il 27/08/2012 11:26, Alexandre DERUMIER ha scritto:
> how can I rollback to the point of the snapshot.
>
> exemple :
> image1.qcow2
> file : /beforesnap1
> take a snaphot (snap1), so qemu switch to snap1.qcow2
> write some file:
> file:
> /aftersnap1.
> /beforesnap1
>
> Now, how can I rollback to the point of time of snap1 ?
> I can reuse image1.qcow2, but if I write some datas on it, I don't
> see how I can return to the point of time of the snap1. (like qemu-image -a
> with internal snapshots)
If you can drop snap1.qcow2 altogether, you just use image1.qcow2 the
next time you start QEMU.
If you cannot, you create snap2.qcow2 based on image1.qcow2:
qemu-img -f qcow2 -obacking_file=image1.qcow2 snap2.qcow2
and use it the next time you start QEMU.
Paolo
next prev parent reply other threads:[~2012-08-27 10:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <10f390de-14b5-45c6-8d24-202e40cc2598@mailpro>
2012-08-25 13:25 ` [Qemu-devel] qcow2: online snasphots : internal vs external ? Alexandre DERUMIER
2012-08-25 14:01 ` Stefan Hajnoczi
2012-08-25 17:06 ` Alexandre DERUMIER
2012-08-26 7:07 ` Stefan Hajnoczi
2012-08-26 9:56 ` Alexandre DERUMIER
2012-08-27 9:04 ` Stefan Hajnoczi
2012-08-27 9:26 ` Alexandre DERUMIER
2012-08-27 10:10 ` Paolo Bonzini [this message]
2012-08-27 13:12 ` Alexandre DERUMIER
2012-08-27 10:13 ` Paolo Bonzini
2012-08-27 16:12 ` Kevin Wolf
2012-08-28 8:11 ` Stefan Hajnoczi
2012-08-28 8:22 ` Alexandre DERUMIER
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