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Re: [Qemu-devel] qcow2 snapshot + resize


From: Max Reitz
Subject: Re: [Qemu-devel] qcow2 snapshot + resize
Date: Mon, 4 Jan 2016 18:38:08 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0

On 29.12.2015 10:38, lihuiba wrote:
> Hi,
> 
> In our production environment, we need to extend a qcow2 image with
> snapshots in it. This feature, however, is not implemented yet. 
> 
> So I want to ask, if this feature is under active development?

No, it is not.

> How can I
> help with this feature?

Well, you can implement it. ;-)

> It seems that, this feature is not too difficult as long as cluster_size
> is kept unchanged. Is this correct?

The thing is that one would need to update all the inactive L1 tables. I
don't think it should be too difficult, it's just that apparently so far
nobody ever had the need for this feature.

I can take a look, but I can't say anything about whether or when
anything will come out of it.

Max

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