4 - must scrub before tier agent can activate
8 - sudo ceph osd erasure-code-profile set teuthologyprofile crush-failure-domain=osd m=1 k=2
9 - sudo ceph osd pool create base 4 4 erasure teuthologyprofile
10 - sudo ceph osd pool set base min_size 2
11 - sudo ceph osd pool create cache 4
12 - sudo ceph osd tier add base cache
13 - sudo ceph osd tier cache-mode cache writeback
14 - sudo ceph osd tier set-overlay base cache
15 - sudo ceph osd pool set cache hit_set_type bloom
16 - sudo ceph osd pool set cache hit_set_count 8
17 - sudo ceph osd pool set cache hit_set_period 60
18 - sudo ceph osd pool set cache target_max_objects 5000