On Sun, Dec 29, 2019 at 9:21 PM zhengyin(a)cmss.chinamobile.com
<zhengyin(a)cmss.chinamobile.com> 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(a)cmss.chinamobile.com
[1]
https://tracker.ceph.com/issues/42248
--
Jason