mds active vs standby

root@node-1:/# ceph mds stat
e3123: 0/1/1 up, 3 up:standby
root@node-1:/# ceph mds dump
dumped mdsmap epoch 3123
epoch   3123
flags   0
created 2016-02-11 13:58:39.190528
modified        2016-06-21 14:54:05.724804
tableserver     0
root    0
session_timeout 60
session_autoclose       300
max_file_size   1099511627776
last_failure    843
last_failure_osd_epoch  2186
compat  compat={},rocompat={},incompat={1=base v0.20,2=client writeable ranges,3=default file layouts on dirs,4=dir inode in separate object,5=mds uses versioned encoding,6=dirfrag is stored in omap,8=no anchor table}
max_mds 1
in      0
up      {}
failed
damaged
stopped
data_pools      21
metadata_pool   20
inline_data     disabled
524208: 10.0.1.3:6800/28 'mds-node-1' mds.-1.0 up:standby seq 1
554174: 10.0.1.5:6800/29 'mds-node-3' mds.-1.0 up:standby seq 2
554180: 10.0.1.7:6800/45 'mds-node-5' mds.-1.0 up:standby seq 2
root@node-1:/# ceph --admin-daemon /var/run/ceph/ceph-mds.mds-node-1.asok config show | grep standby
    "mon_force_standby_active": "true",
    "mds_standby_for_name": "",
    "mds_standby_for_rank": "-1",
    "mds_standby_replay": "false",
root@node-1:/#