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[Qemu-devel] Re: Question on qcow2 image with base image

From: Kevin Wolf
Subject: [Qemu-devel] Re: Question on qcow2 image with base image
Date: Wed, 03 Feb 2010 10:13:29 +0100
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20091209 Fedora/3.0-4.fc12 Thunderbird/3.0

Am 02.02.2010 18:47, schrieb Naphtali Sprei:
> Hi,
> when I use a qcow2 image based on a base image, what should happen when I 
> invoke the commit command from the qemu monitor ?
> Is it expected/intended to "flush" the data into the base image ?

Yes, this is what it's meant to do.

> IIUC, that is what happening in the released qemu (0.12).
> I would expect it not to touch the base image.

Well, committing to the base image without touching it sounds rather
difficult. ;-) If you don't want to touch the backing file, don't use
the commit command.


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