Package org.apache.hadoop.hdfs.tools

Class Summary

Class	Description
AdminHelper	Helper methods for CacheAdmin/CryptoAdmin/StoragePolicyAdmin
CacheAdmin	This class implements command-line operations on the HDFS Cache.
CryptoAdmin	This class implements crypto command-line operations.
DebugAdmin	This class implements debug operations on the HDFS command-line.
DelegationTokenFetcher	Fetch a DelegationToken from the current Namenode and store it in the specified file.
DFSAdmin	This class provides some DFS administrative access shell commands.
DFSck	This class provides rudimentary checking of DFS volumes for errors and sub-optimal conditions.
DFSHAAdmin	Class to extend HAAdmin to do a little bit of HDFS-specific configuration.
DFSZKFailoverController
DiskBalancerCLI	DiskBalancer is a tool that can be used to ensure that data is spread evenly across volumes of same storage type.
ECAdmin	CLI for the erasure code encoding operations.
GetConf	Tool for getting configuration information from a configuration file.
GetGroups	HDFS implementation of a tool for getting the groups which a given user belongs to.
HDFSConcat
JMXGet	tool to get data from NameNode or DataNode using MBeans currently the following MBeans are available (under hadoop domain): hadoop:service=NameNode,name=FSNamesystemState (static) hadoop:service=NameNode,name=NameNodeActivity (dynamic) hadoop:service=NameNode,name=RpcActivityForPort9000 (dynamic) hadoop:service=DataNode,name=RpcActivityForPort9867 (dynamic) hadoop:name=service=DataNode,FSDatasetState-UndefinedStorageId663800459 (static) hadoop:service=DataNode,name=DataNodeActivity-UndefinedStorageId-520845215 (dynamic) implementation note: all logging is sent to System.err (since it is a command line tool)
NNHAServiceTarget	One of the NN NameNodes acting as the target of an administrative command (e.g.
StoragePolicyAdmin	This class implements block storage policy operations.