Hello, we are running a ceph cluster + rgw on luminous 12.2.12 that serves as a
S3 compatible storage. We have noticed some buckets where the `rgw.none` from
the output of `radosgw-admin bucket stats` shows extremely large value for
`num_objects`, which is not convincible. It does look like an underflow by
subtracting a positive number from 0 and then the value is interpreted and
shown as an uint64. For example,
```
# radosgw-admin bucket stats --bucket redacted
{
"bucket": "redacted",
...........
"usage": {
"rgw.none": {
"size": 0,
"size_actual": 0,
"size_utilized": 0,
"size_kb": 0,
"size_kb_actual": 0,
"size_kb_utilized": 0,
"num_objects": 18446744073709551607
},
"rgw.main": {
"size": 1687971465874,
"size_actual": 1696692400128,
"size_utilized": 1687971465874,
"size_kb": 1648409635,
"size_kb_actual": 1656926172,
"size_kb_utilized": 1648409635,
"num_objects": 4290147
},
"rgw.multimeta": {
"size": 0,
"size_actual": 0,
"size_utilized": 0,
"size_kb": 0,
"size_kb_actual": 0,
"size_kb_utilized": 0,
"num_objects": 75
}
},
"bucket_quota": {
"enabled": false,
"check_on_raw": false,
"max_size": -1,
"max_size_kb": 0,
"max_objects": -1
}
}
```
We did find a few reports on this issue, eg.
http://lists.ceph.com/pipermail/ceph-users-ceph.com/2019-November/037531.html.
Do we know any use patterns that can lead object count to become that large?
Also is there a way to accurately collect the object count for each bucket in
the cluster, as we would like to use it for management purpose.
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