Thanks Jason， you are right. My code didn't update in time, The bug has fixed in https://tracker.ceph.com/issues/42248, zhengyin@xxxxxxxxxxxxxxxxxxxx From: Jason Dillaman Date: 2020-01-03 00:25 To: zhengyin@xxxxxxxxxxxxxxxxxxxx CC: yangjun; ceph-users Subject: Re: report librbd bug export-diff On Sun, Dec 29, 2019 at 9:21 PM zhengyin@xxxxxxxxxxxxxxxxxxxx <zhengyin@xxxxxxxxxxxxxxxxxxxx> wrote: > > Hello dillaman: > > Problem: create a clone from a parent image, create a snapshot on the clone, when I use command "rbd export-diff <pool>/clone@snap <file> --whole-object", it can't diff parent image data. But I use this command without "--whole-object", it is ok. > > steps: > 1、rbd create volumes/test1 -s 1G > > 2、write data to volumes/test1 (offset=0, len=8388608) > > 3、rbd snap create volumes/test1@snap > > 4、rbd snap protect volumes/test1@snap > > 5、rbd clone volumes/test1@snap volumes/clone1 > > 6、write data to volumes/clone1 (offset=16777216, len=4194304) > > 7、rbd snap create volumes/clone1@snap1 > > 8、rbd export-diff volumes/clone1@snap1 /root/diff1 --whole-object > It only diffs data [16777216L, 20971520L] > > 9、rbd export-diff volumes/clone1@snap1 /root/diff2 > It is ok and can diffs data [0L, 8388608L], [16777216L, 20971520L] > > If you confirm that this is a bug or fix it, please let me know, thank you very much. Is this the same as this ticket [1] that was recently fixed in master and is pending backport? > > ________________________________ > zhengyin@xxxxxxxxxxxxxxxxxxxx [1] https://tracker.ceph.com/issues/42248 -- Jason _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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