On Mon, Jun 25, 2012 at 3:06 PM, Zhi Yong Wu wrote:
> On Fri, Jun 22, 2012 at 11:08 PM, Stefan Hajnoczi
> wrote:
>> This series aims to improve qcow2 performance with cache=writethrough and
>> cache=directsync. In particular it reduces the impact of metadata updates
>> for
> What does cache=dir
On Fri, Jun 22, 2012 at 11:08 PM, Stefan Hajnoczi
wrote:
> This series aims to improve qcow2 performance with cache=writethrough and
> cache=directsync. In particular it reduces the impact of metadata updates for
What does cache=directsync mean? what is the difference between them?
> allocating w
This series aims to improve qcow2 performance with cache=writethrough and
cache=directsync. In particular it reduces the impact of metadata updates for
allocating writes.
Allocating writes are expensive because they involve updating L2 tables and
refcount blocks. In addition they can also cause
