Jaze, On Mon, Aug 22, 2016 at 04:46:04PM +0800, Jaze Lee wrote: > I found that rbd journaling first write journal and then write data. > Why we not first write data and then write journal? Is there some > considerration > for which is first ? It looks like you already asked this question some time ago. Have you missed Jason's response? http://www.spinics.net/lists/ceph-devel/msg30167.html Or are you unsatisfied with his answer? -- Mykola Golub -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html