Package org.apache.hadoop.hdfs.server.namenode.ha

Interface Summary

Interface	Description
HAContext	Context that is to be used by HAState for getting/setting the current state and performing required operations.

Class Summary

Class	Description
ActiveState	Active state of the namenode.
BootstrapStandby	Tool which allows the standby node's storage directories to be bootstrapped by copying the latest namespace snapshot from the active namenode.
EditLogTailer	EditLogTailer represents a thread which periodically reads from edits journals and applies the transactions contained within to a given FSNamesystem.
HAState	Namenode base state to implement state machine pattern.
NameNodeHAProxyFactory<T>
RemoteNameNodeInfo	Information about a single remote NameNode
StandbyCheckpointer	Thread which runs inside the NN when it's in Standby state, periodically waking up to take a checkpoint of the namespace.
StandbyState	Namenode standby state.