Package org.apache.hadoop.hdfs.tools

Class Summary
DelegationTokenFetcher Fetch a DelegationToken from the current Namenode and store it in the specified file.
DFSAdmin This class provides some DFS administrative access.
DFSck This class provides rudimentary checking of DFS volumes for errors and sub-optimal conditions.
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=RpcActivityForPort50020 (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)
 



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