Hi,
just for clarity, you're actually talking about the cache tier as
described in the docs [1]? And you followed the steps until 'ceph osd
tier remove cold-storage hot-storage' successfully? And the pool has
been really deleted successfully ('ceph osd pool ls detail')?
[1]
https://docs.ceph.com/en/latest/rados/operations/cache-tiering/#removing-a-cache-tier
Zitat von Malte Stroem <malte.stroem@xxxxxxxxx>:
Hello,
we removed an SSD cache tier and its pool.
The PGs for the pool do still exist.
The cluster is healthy.
The PGs are empty and they reside on the cache tier pool's SSDs.
We like to take out the disks but it is not possible. The cluster
sees the PGs and answers with a HEALTH_WARN.
Because of the replication of three there are still 128 PGs on three
of the 24 OSDs. We were able to remove the other OSDs.
Summary:
- pool removed
- 3 x 128 empty PGs still exist
- 3 of 24 OSDs still exist
How is it possible to remove these empty and healthy PGs?
The only way I found was something like:
ceph pg {pg-id} mark_unfound_lost delete
Is that the right way?
Some output of:
ceph pg ls-by-osd 23
PG OBJECTS DEGRADED MISPLACED UNFOUND BYTES OMAP_BYTES*
OMAP_KEYS* LOG STATE SINCE VERSION REPORTED UP
ACTING SCRUB_STAMP DEEP_SCRUB_STAMP
3.0 0 0 0 0 0 0 0
0 active+clean 27h 0'0 2627265:196316
[15,6,23]p15 [15,6,23]p15 2023-09-28T12:41:52.982955+0200
2023-09-27T06:48:23.265838+0200
3.1 0 0 0 0 0 0 0
0 active+clean 9h 0'0 2627266:19330
[6,23,15]p6 [6,23,15]p6 2023-09-29T06:30:57.630016+0200
2023-09-27T22:58:21.992451+0200
3.2 0 0 0 0 0 0 0
0 active+clean 2h 0'0 2627265:1135185
[23,15,6]p23 [23,15,6]p23 2023-09-29T13:42:07.346658+0200
2023-09-24T14:31:52.844427+0200
3.3 0 0 0 0 0 0 0
0 active+clean 13h 0'0 2627266:193170
[6,15,23]p6 [6,15,23]p6 2023-09-29T01:56:54.517337+0200
2023-09-27T17:47:24.961279+0200
3.4 0 0 0 0 0 0 0
0 active+clean 14h 0'0 2627265:2343551
[23,6,15]p23 [23,6,15]p23 2023-09-29T00:47:47.548860+0200
2023-09-25T09:39:51.259304+0200
3.5 0 0 0 0 0 0 0
0 active+clean 2h 0'0 2627265:194111
[15,6,23]p15 [15,6,23]p15 2023-09-29T13:28:48.879959+0200
2023-09-26T15:35:44.217302+0200
3.6 0 0 0 0 0 0 0
0 active+clean 6h 0'0 2627265:2345717
[23,15,6]p23 [23,15,6]p23 2023-09-29T09:26:02.534825+0200
2023-09-27T21:56:57.500126+0200
Best regards,
Malte
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