4 - must scrub before tier agent can activate
8 - sudo ceph osd erasure-code-profile set myprofile crush-failure-domain=osd m=2 k=2
9 - sudo ceph osd pool create base 4 4 erasure myprofile
10 - sudo ceph osd pool application enable base rados
11 - sudo ceph osd pool set base min_size 2
12 - sudo ceph osd pool create cache 4
13 - sudo ceph osd tier add base cache
14 - sudo ceph osd tier cache-mode cache writeback
15 - sudo ceph osd tier set-overlay base cache
16 - sudo ceph osd pool set cache hit_set_type bloom
17 - sudo ceph osd pool set cache hit_set_count 8
18 - sudo ceph osd pool set cache hit_set_period 60
19 - sudo ceph osd pool set cache target_max_objects 5000