DevelopmentCommandLineOptions

Command Line Options of bin/hadoop

See each entry for datails of the command arguments and options.

Command	Function
hadoop-0.1-dev/bin/hadoop namenode	run the DFS Name Node.
hadoop-0.1-dev/bin/hadoop datanode	run a DFS Data Node.
hadoop-0.1-dev/bin/hadoop dfs	run a DFS admin client.
hadoop-0.1-dev/bin/hadoop distcp	run a map-reduce job to copy data to and from dfs.
hadoop-0.1-dev/bin/hadoop jobtracker	run the MapReduce Job Tracker node.
hadoop-0.1-dev/bin/hadoop tasktracker	run a MapReduce Task Tracker node.
hadoop-0.1-dev/bin/hadoop job	manipulate MapReduce jobs.
hadoop-0.1-dev/bin/hadoop jar	run a jar file.
hadoop-0.1-dev/bin/hadoop CLASSNAME	run the class named CLASSNAME.
Command	Function

Hadoop Generic Options

Hadoop has an option parsing framework that employs parsing generic options as well as running classes. Hadoop generic arguments are :

-conf <configuration file> : specify an application configuration file

-D <property=value> : use value for given property

-fs <local|namenode:port> : specify a namenode local means use the local file system as your DFS, <namenode:port> specifies a particular name node to contact.

-jt <local|jobtracker:port> : specify a job tracker

The general command line syntax is

bin/hadoop command [genericOptions] [commandOptions]

dfs, distcp and job targets accept these generic options.