# ceph -s
  cluster:
    id:     xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    health: HEALTH_WARN
            crush map has straw_calc_version=0
 
  services:
    mon: 1 daemons, quorum ceph-mon0
    mgr: ceph-mon0(active), standbys: ceph-mds
    mds: cephfs-1/1/1 up  {0=ceph-mds=up:active}
    osd: 3 osds: 3 up, 3 in
 
  data:
    pools:   4 pools, 160 pgs
    objects: 462  objects, 1.7 GiB
    usage:   8.0 GiB used, 292 GiB / 300 GiB avail
    pgs:     160 active+clean
 
# ceph osd crush set-tunable straw_calc_version 1
adjusted tunable straw_calc_version to 1
# ceph -s
  cluster:
    id:     6120e37d-39b1-4ec9-bf5f-f3b0c63bd056
    health: HEALTH_OK
 
  services:
    mon: 1 daemons, quorum ceph-mon0
    mgr: ceph-mon0(active), standbys: ceph-mds
    mds: cephfs-1/1/1 up  {0=ceph-mds=up:active}
    osd: 3 osds: 3 up, 3 in
 
  data:
    pools:   4 pools, 160 pgs
    objects: 462  objects, 1.7 GiB
    usage:   8.0 GiB used, 292 GiB / 300 GiB avail
    pgs:     160 active+clean