[libvirt] [Qemu-devel] live snapshot wiki updated

Blue Swirl blauwirbel at gmail.com
Fri Jul 22 16:09:35 UTC 2011

On Fri, Jul 22, 2011 at 11:11 AM, Kevin Wolf <kwolf at redhat.com> wrote:
> Am 22.07.2011 09:36, schrieb Avi Kivity:
>> On 07/20/2011 04:51 PM, Kevin Wolf wrote:
>>>>  The problem is that QEMU will find backing file file names inside the
>>>>  images which it will be unable to open. How do you suggest we get around
>>>>  that?
>>> This is the part with allowing libvirt to override the backing file. Of
>>> course, this is not something that we can add with five lines of code,
>>> it requires -blockdev.
>> It can be done without blockdev.  Have a dictionary that translates
>> filenames, and populate it from the command line (for a bonus, translate
>> a filename to a file descriptor inherited from the caller or passed via
>> the monitor).
> Sure, you can always add ugly hacks, but it isn't the right solution
> that we want to use for all times. However, once we use it, it will show
> up in the external API and we'll never get rid of it again.

Fully agree. This would also be a highly specific API for QCOW2 and
similar formats.

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