Package org.apache.hadoop.hdfs.server.balancer

Interface Summary

Interface	Description
Matcher	A matcher interface for matching nodes.

Class Summary

Class	Description
Balancer	The balancer is a tool that balances disk space usage on an HDFS cluster when some datanodes become full or when new empty nodes join the cluster.
Dispatcher	Dispatching block replica moves between datanodes.
Dispatcher.DBlock	A class for keeping track of block locations in the dispatcher.
Dispatcher.DBlockStriped
Dispatcher.DDatanode	A class that keeps track of a datanode.
Dispatcher.StorageGroupMap<G extends Dispatcher.DDatanode.StorageGroup>
KeyManager	The class provides utilities for key and token management.
MovedBlocks<L>	This window makes sure to keep blocks that have been moved within a fixed time interval (default is 1.5 hour).
MovedBlocks.Locations<L>	A class for keeping track of a block and its locations
NameNodeConnector	The class provides utilities for accessing a NameNode.

Enum Summary

Enum	Description
ExitStatus	Exit status - The values associated with each exit status is directly mapped to the process's exit code in command line.