Package org.apache.hadoop.hdfs.tools

package org.apache.hadoop.hdfs.tools
  • 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.