Re: [Qemu-devel] Image streaming and live block copy

[Anthony Liguori]

On 06/17/2011 03:36 AM, Kevin Wolf wrote:
> Am 16.06.2011 16:52, schrieb Marcelo Tosatti:
> > On Thu, Jun 16, 2011 at 03:08:30PM +0200, Kevin Wolf wrote:
> > Over this scheme, you'd have:
> >
> > 1) Block copy.
> > Reopen image to be copied with
> > blkstream:/path/to/current-image:/path/to/destination-image,
> > background read sectors 0...N.
> >
> > 2) Image stream:
> > blkstream:remote-image:/path/to/local-image,
> > background read sectors 0...N.
> >
> > Where remote-image is remote accessible image such as NBD.
>
> I think that should work.
>
> By the way, we'll get problems with the colon syntax. Without -blockdev
> we'll have to invent a new syntax, maybe with brackets:
>
> blkstream:[nbd:localhost]:out.qcow2

So what's the main issue with -blockdev today?  Just need someone to 
spend some time implementing it?

Also, it would be a useful exercise to try and capture some of this in 
the wiki.  That makes it a bit easier to reference as we move forward.

Regards,

Anthony Liguori

> Kevin