Re: [Qemu-devel] [question] incremental backup a running vm

[Zhang Haoyu]

On 2015-01-26 19:29:03, Paolo Bonzini wrote:
>
> On 26/01/2015 12:13, Zhang Haoyu wrote:
> > Thanks, Paolo,
> > but too many internal snapshots were saved by customers,
>> switching to external snapshot mechanism has significant impaction
> > on subsequent upgrade.
> 
> In that case, patches are welcome. :)
>
> > Another problem:
> > drive_backup just implement one time backup,
> > but I want VMWare's VDP-like backup mechanism.
> > The initial backup of a virtual machine takes comparatively more time,
>> because all of the data for that virtual machine is being backed up. 
> > Subsequent backups of the same virtual machine take less time, because
> > changed block tracking (log dirty) mechanism is used to only backup the 
> > dirty data.
> > After inittial backup done, even the VM shutdown, but subsequent backup 
> > also only 
>> copy the changed data.
> 
> As mentioned before, patches for this are on the list.
> 
I see, thanks, Paolo.
> Paolo