Hi,
I've noticed that a number of placement groups in our setup contain
objects, but no actual data
(ceph pg dump | grep remapped during a hard disk replace operation):
7.616 2636 0 0 5272 0 4194304 3003 3003
active+remapped+wait_backfill 2015-06-29 13:43:28.716687
159913'33987 160091:526298 [30,6,36] 30
[30,36,3] 30 153699'33892 2015-06-29
07:30:16.030470 149573'32565 2015-06-23 07:00:21.948563
7.60a 2696 0 0 5392 0 0 3046 3046
active+remapped+wait_backfill 2015-06-29 13:43:09.847541
159919'34627 160091:388532 [2,36,3] 2
[2,36,31] 2 153669'34496 2015-06-28
20:09:51.850005 153669'34496 2015-06-28 20:09:51.850005
7.60d 2694 0 2 5388 0 0 3026 3026
active+remapped+wait_backfill 2015-06-29 13:43:27.202928
159939'33708 160091:392535 [31,6,38] 31
[31,38,3] 31 152584'33610 2015-06-29
07:11:37.484500 152584'33610 2015-06-29 07:11:37.484500
....
Pool 7 was used a data pool in cephfs, but almost all files stored in
that pool have been removed:
~# rados df
pool name KB objects clones degraded
unfound rd rd KB wr wr KB
cephfs_test_data 940066 5537838 0 202
0 2022238 1434381904 21823705 3064326550
Is it possible to remove these "zombie" objects, since they influence
maintenance operations like backfilling or recovery?
Best regards,
Burkhard
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