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Date: Wed, 6 Mar 2013 16:48:17 +0100
From: Kevin Wolf <kwolf@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH v4 3/6] add backup related monitor commands
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To: Dietmar Maurer <dietmar@proxmox.com>
Cc: Stefan Hajnoczi <stefanha@gmail.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

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