On Mon, May 07, 2012 at 10:53:31AM +0800, Liu Yuan wrote: > On 05/07/2012 03:37 AM, MORITA Kazutaka wrote: > > > Though it is important to support a write caching feature in Sheepdog, > > I think we should disable it by default for now because there are > > still some cache coherency problems which looks hard to solve: > > > Disagree with the patch. > > QEMU setup already disables object cache as default (writethrough mode). > If users explicitly enables, he knows better than us to do such a policy. cache=none is the defualt for any serious user of qemu. I'd really avoid automatically enabling a feature like the object cache which seems to weaken the persistancy semantics, and doesn't even have proper documentation. |