Package org.apache.hadoop.hdfs.tools
package org.apache.hadoop.hdfs.tools
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ClassesClassDescriptionHelper methods for CacheAdmin/CryptoAdmin/StoragePolicyAdminThis class implements command-line operations on the HDFS Cache.This class implements crypto command-line operations.This class implements debug operations on the HDFS command-line.Fetch a DelegationToken from the current Namenode and store it in the specified file.This class provides some DFS administrative access shell commands.This class provides rudimentary checking of DFS volumes for errors and sub-optimal conditions.Class to extend HAAdmin to do a little bit of HDFS-specific configuration.DiskBalancer is a tool that can be used to ensure that data is spread evenly across volumes of same storage type.CLI for the erasure code encoding operations.Tool for getting configuration information from a configuration file.HDFS implementation of a tool for getting the groups which a given user belongs to.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)One of the NN NameNodes acting as the target of an administrative command (e.g. failover).This class implements block storage policy operations.