Ceph » CephFS

The config settings here are wrong:

http://docs.ceph.com/docs/master/cephfs/standby/

The settings should be prefixed with "mds". For example:

[mds.a]
mds standby replay = true
mds standby for rank = 0

[mds.b]
mds standby replay = true
mds standby for rank = 0