# ceph -s
   health HEALTH_OK
   monmap e1: 1 mons at {a=127.0.0.1:6789/0}, election epoch 1, quorum 0 a
   osdmap e8: 2 osds: 2 up, 2 in
    pgmap v38: 576 pgs: 576 active+clean; 8730 bytes data, 6506 MB used, 2007 MB / 8969 MB avail
   mdsmap e9: 1/1/1 up {0=a=up:active}