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

[Kevin Wolf]

Am 06.03.2013 um 15:42 hat Dietmar Maurer geschrieben:
> > > > Maybe you'd better use a different output format that doesn't
> > > > restrict you to 64k writes.
> > >
> > > The output format is not really the restriction. The problem is that
> > > an additional IPC layer add overhead, an d I do not want that (because it 
> > > is
> > totally unnecessary).
> > 
> > I missed the reason why you cannot increase the block size.  
> 
> 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.

Kevin