Class | Description |
---|---|
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 | |
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=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)
|
NNHAServiceTarget |
One of the NN NameNodes acting as the target of an administrative command
(e.g.
|
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