4 - must scrub before tier agent can activate
8 - ceph osd pool create cache-pool 4
9 - ceph osd tier add base-pool cache-pool
10 - ceph osd tier cache-mode cache-pool writeback
11 - ceph osd tier set-overlay base-pool cache-pool
12 - ceph osd pool set cache-pool hit_set_type bloom
13 - ceph osd pool set cache-pool hit_set_count 8
14 - ceph osd pool set cache-pool hit_set_period 5