STATE_NULL = CEPH_MDS_STATE_NULL, // null value for fns returning this type.
STATE_BOOT = CEPH_MDS_STATE_BOOT, // up, boot announcement. destiny unknown.
STATE_STANDBY = CEPH_MDS_STATE_STANDBY, // up, idle. waiting for assignment by monitor.
- STATE_STANDBY_REPLAY = CEPH_MDS_STATE_STANDBY_REPLAY, // up, replaying active node, ready to take over.
// States of an MDS rank, and of any MDS daemon holding that rank
// ==============================================================
+ STATE_STANDBY_REPLAY = CEPH_MDS_STATE_STANDBY_REPLAY, // up, replaying active node, ready to take over and not serving clients. Note: Up to two MDS hold the rank being replayed.
STATE_STOPPED = CEPH_MDS_STATE_STOPPED, // down, once existed, but no subtrees. empty log. may not be held by a daemon.
STATE_CREATING = CEPH_MDS_STATE_CREATING, // up, creating MDS instance (new journal, idalloc..).