Re: [PATCH v2] storage: Upgrade default qcow2 verion to 1.1

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On Tue, Mar 12, 2024 at 10:36:28AM +0100, Peter Krempa wrote:
> On Wed, Mar 06, 2024 at 01:20:13 +0530, Abhiram Tilak wrote:
> > Change the default to modern qcow2 as it's supported by all qemu
> > versions supported by libvirt and in fact 'qemu-img' already defaults to
> > the new format for a long time.
> > 
> > Some Unittests require changes to pass, now that version 1.1 is default.
> > Unittests like `qcow2-1.1.argv` may not be relevant anymore, but this patch
> > doesn't affect them.
> 
> I've added a:
> 
> Closes: https://gitlab.com/libvirt/libvirt/-/issues/602
> 
> > 
> > Signed-off-by: Abhiram Tilak <atp.exp@xxxxxxxxx>
> > Reviewed-by: Peter Krempa <pkrempa@xxxxxxxxxx>
> > ---
> 
> And pushed the patch; thanks for fixing this.

...but this is a behavioural change of our API.  Images created by
applications will now have reduced portability across platforms,
since v3 is supported by a subset of platforms that support v2,
which I would call a regression.

With regards,
Daniel
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