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Re: [Qemu-devel] qemu-img convert of a backing qcow2 snapshot (THANKS)

From: Christopher Pereira
Subject: Re: [Qemu-devel] qemu-img convert of a backing qcow2 snapshot (THANKS)
Date: Tue, 12 Jul 2016 16:16:31 -0400
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0

On 12-Jul-16 10:07, Eric Blake wrote:
On 07/11/2016 09:42 PM, Christopher Pereira wrote:

Let's say we have this chain:

     base <--- sn1 <--- sn2 <--- active

Can we shutdown the VM and "qemu-img convert sn2 -O qcow2 sn2_new" and
rebase active to sn2_new like this:

     sn2_new <--- active

Yes. As long as the guest-visible data in 'base <- sn1 <- sn2' is
identical to the guest-visible data in 'sn2_new', then it doesn't matter
which of the two files is used as the backing file for 'active'.
Nice! Thanks Eric for confirming and for all your brilliant work.

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