[sheepdog] [PATCH v1, RFC] sheep: writeback cache semantics in backend store

[MORITA Kazutaka]

At Wed, 29 Aug 2012 12:18:50 +0800,
Liu Yuan wrote:
> 
> On 08/29/2012 12:10 PM, MORITA Kazutaka wrote:
> > How about the following?
> > 
> >   -w object,disk    turn on both object cache and disk cache
> >   -w object         turn on only object cache
> >   -w disk           turn on only disk cache
> 
> Looks okay to me, seems that this require changes on QEMU and protocol
> between QEMU and sheepdog.

Yes, because QEMU needs to let sheepdog know the using cache semantics
(writeback or writethrough).  Perhaps, this patch should be postponed
until Sheepdog 0.5.0 and QEMU 1.2 are released.

Thanks,

Kazutaka