+``db_uuid``
+-----------
+Just used on :term:`bluestore` backends. Captures either the logical volume UUID or
+the partition UUID.
+
+Example::
+
+ ceph.db_uuid=F9D02CF1-31AB-4910-90A3-6A6302375525
+
+
+``wal_device``
+--------------
+Just used on :term:`bluestore` backends. Captures the path to the logical
+volume path.
+
+Example::
+
+ ceph.wal_device=/dev/mapper/vg-wal-0
+
+
+``wal_uuid``
+------------
+Just used on :term:`bluestore` backends. Captures either the logical volume UUID or
+the partition UUID.