[Sheepdog] [PATCH] sheep: disable object cache by default

[Christoph Hellwig]

On Wed, May 09, 2012 at 05:25:23PM +0900, MORITA Kazutaka wrote:
> Are you saying that qemu-img should use cache=writethrough by default?
> I think it's not acceptable for qemu community.

Also there are many setups where we can't easily control the settings
for every possible user, while disabling things on the servers is a lot
easier.  Independent of that I think a feature that actually changes
the semantics of data storage.

> It's a bug that the sheepdog write cache doesn't allow both writeback
> and writethrough requests to the same image.  We should provide a way
> to disable it until it is fixed.

Agreed.