Hi all we plan to use openstack on our production, we are not sure which disk type will be the better choice I did a little test on qcow2 and it's performance looks good when I use cache=writeback can some one give us some advice, or some article, cause for such common topic must be discussed before thanks -- =========================== William Herry WilliamHerryChina at Gmail.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20120417/33f6ae13/attachment.html>