Re: [Qemu-devel] Tunneled Migration with Non-Shared Storage

[Daniel P. Berrange]

On Wed, Nov 19, 2014 at 09:35:16AM +0000, Dr. David Alan Gilbert wrote:
> * Paolo Bonzini (address@hidden) wrote:
> > 
> > 
> > On 18/11/2014 21:28, Dr. David Alan Gilbert wrote:
> > > This seems odd, since as far as I know the tunneling code is quite 
> > > separate
> > > to the migration code; I thought the only thing that the migration
> > > code sees different is the file descriptors it gets past.
> > > (Having said that, again I don't know storage stuff, so if this
> > > is a storage special there may be something there...)
> > 
> > Tunnelled migration uses the old block-migration.c code.  Non-tunnelled
> > migration uses the NBD server and block/mirror.c. 
> 
> OK, that explains that.  Is that because the tunneling code can't 
> deal with tunneling the NBD server connection?

Yep, pretty much. The tunnelling code was built around the idea of a
single connection to be tunnelled.

Regards,
Daniel
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