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From: walt <w41ter@gmail.com>
Date: Sun, 14 Dec 2008 14:07:31 -0800
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Subject: [Qemu-devel] Re: snapshot vs COW?
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To: qemu-devel@nongnu.org

Thiemo Seufer wrote:
> Jamie Lokier wrote:
>> walt wrote:
>>> COW is a nice feature but it is currently broken, so don't use it
>>> until it gets fixed.  When you commit any changes your backing file
>>> will be corrupted.

>> Aieee!  I use COW instead of snapshots in my management scripts,
>> because snapshots are harder to manage.
>>
>> Is the COW brokenness documented?  What version did it start being broken?

> Cow2 is broken in the 0.9.1 release, it was fixed shortly afterwards.
> The symptom was corruption of the image when it grew beyond 4 GB...

Glad to hear it, thanks for the update.  That means that the fix is
already in the kvm git repository?