org.apache.hadoop.hdfs.tools (Apache Hadoop Main 3.5.0 API)
Description: declaration: package: org.apache.hadoop.hdfs.tools

# Package org.apache.hadoop.hdfs.tools

package org.apache.hadoop.hdfs.tools

- Related Packages
  Package
  Description
  org.apache.hadoop.hdfs
  A distributed implementation of `FileSystem`.
  org.apache.hadoop.hdfs.tools.federation
  It includes the tools to manage the Router-based federation.
  org.apache.hadoop.hdfs.tools.offlineEditsViewer
  org.apache.hadoop.hdfs.tools.offlineImageViewer
  org.apache.hadoop.hdfs.tools.snapshot
- Classes
  Class
  Description
  org.apache.hadoop.hdfs.tools.AdminHelper
  Helper methods for CacheAdmin/CryptoAdmin/StoragePolicyAdmin
  org.apache.hadoop.hdfs.tools.CacheAdmin
  This class implements command-line operations on the HDFS Cache.
  org.apache.hadoop.hdfs.tools.CryptoAdmin
  This class implements crypto command-line operations.
  org.apache.hadoop.hdfs.tools.DebugAdmin
  This class implements debug operations on the HDFS command-line.
  org.apache.hadoop.hdfs.tools.DelegationTokenFetcher
  Fetch a DelegationToken from the current Namenode and store it in the specified file.
  org.apache.hadoop.hdfs.tools.DFSAdmin
  This class provides some DFS administrative access shell commands.
  org.apache.hadoop.hdfs.tools.DFSck
  This class provides rudimentary checking of DFS volumes for errors and sub-optimal conditions.
  org.apache.hadoop.hdfs.tools.DFSHAAdmin
  Class to extend HAAdmin to do a little bit of HDFS-specific configuration.
  org.apache.hadoop.hdfs.tools.DFSZKFailoverController
  org.apache.hadoop.hdfs.tools.DiskBalancerCLI
  DiskBalancer is a tool that can be used to ensure that data is spread evenly across volumes of same storage type.
  org.apache.hadoop.hdfs.tools.ECAdmin
  CLI for the erasure code encoding operations.
  org.apache.hadoop.hdfs.tools.GetConf
  Tool for getting configuration information from a configuration file.
  org.apache.hadoop.hdfs.tools.GetGroups
  HDFS implementation of a tool for getting the groups which a given user belongs to.
  org.apache.hadoop.hdfs.tools.HDFSConcat
  org.apache.hadoop.hdfs.tools.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)
  org.apache.hadoop.hdfs.tools.NNHAServiceTarget
  One of the NN NameNodes acting as the target of an administrative command (e.g. failover).
  org.apache.hadoop.hdfs.tools.StoragePolicyAdmin
  This class implements block storage policy operations.