* OSD: Ceph now uses mclock_scheduler for bluestore OSDs as its default osd_op_queue
to provide QoS. The 'mclock_scheduler' is not supported for filestore OSDs.
Therefore, the default 'osd_op_queue' is set to 'wpq' for filestore OSDs
- and is enforced even if the user attempts to change it.
+ and is enforced even if the user attempts to change it. For more details on
+ configuring mclock see,
+
+ https://docs.ceph.com/en/latest/rados/configuration/mclock-config-ref/
* CephFS: Failure to replay the journal by a standby-replay daemon will now
cause the rank to be marked damaged.