Syntax Summary

The following syntax summary applies to all commands.

hadoop [--config confdir] [COMMAND] [GENERIC_OPTIONS] [COMMAND_OPTIONS]
 
hadoop2 [--config confdir] [COMMAND] [GENERIC_OPTIONS] [COMMAND_OPTIONS]

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

COMMAND_OPTION

Description

-mode

For both the hadoop and hadoop2 commands, setting this option is no longer valid. Both commands default to yarn, the only valid mode for the current MapR version.

--config confdir

Overwrites the default Configuration directory. Default is ${HADOOP_HOME}/conf.

COMMAND

Various commands with their options are described in the following sections.

GENERIC_OPTIONS

The common set of options supported by multiple commands.

COMMAND_OPTIONS

Various command options are described in the following sections.

Note: Running the hadoop script without any arguments prints the help description for all commands.