5 - (CACHE_POOL_NO_HIT_SET)
9 - sudo ceph osd pool create cache 4
10 - sudo ceph osd tier add rbd cache
11 - sudo ceph osd tier cache-mode cache writeback
12 - sudo ceph osd tier set-overlay rbd cache
13 - sudo ceph osd pool set cache hit_set_type bloom
14 - sudo ceph osd pool set cache hit_set_count 8
15 - sudo ceph osd pool set cache hit_set_period 60
16 - sudo ceph osd pool set cache target_max_objects 250