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[Qemu-devel] Re: Question on qcow2 image with base image
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From: |
Kevin Wolf |
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Subject: |
[Qemu-devel] Re: Question on qcow2 image with base image |
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Date: |
Wed, 03 Feb 2010 10:13:29 +0100 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.5) 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.
Kevin