Re: [Qemu-devel] [PATCH v4 3/6] add backup related monitor commands

[Kevin Wolf]

Am 06.03.2013 um 16:33 hat Dietmar Maurer geschrieben:
> > > When we run backup, we need to read such block on every write from the
> > guest.
> > > So if we increase block size we get additional delays.
> > 
> > How about variable block sizes? I mean this is a stream format that has a 
> > header
> > for each block anyway. Include a size there and be done.
> 
> You can make that as complex as you want. I simply do not need that.

Then you also don't need the performance that you lose by using NBD.

Kevin