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Date: Fri, 18 Feb 2011 13:47:51 -0600
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] Re: Strategic decision: COW format
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To: Kevin Wolf <kwolf@redhat.com>
Cc: Chunqiang Tang <ctang@us.ibm.com>, qemu-devel@nongnu.org, Markus Armbruster <armbru@redhat.com>, Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

On 02/18/2011 01:11 PM, Kevin Wolf wrote:
>> A new file format like fvd would be a challenge for the existing ones.
>> Declare its support as unsupported or experimental, but let users
>> decide which one is best suited to their needs!
>>      
> Basically this is what we did for QED. In hindsight I consider it a
> mistake because it set a bad precedence of inventing something new
> instead of fixing what's there.

I don't see how qcow3 is fixing something that's there since it's still 
an incompatible format.

It'd be a stronger argument if you were suggesting something that was 
still fully compatible with qcow2 but once compatibility is broken, it's 
broken.

Regards,

Anthony Liguori

>   I really don't want to convert all my
> images each time to take advantage of new qemu version.
>
> Kevin
>
>