The nodetool utility 

A command line interface for managing a cluster.

The nodetool utility is a command line interface for managing a cluster.

Command format 

  • Package installations: nodetool [(-h <host> | --host <host>)] [(-p <port> | --port <port>)] [(-pwf <passwordFilePath> | --password-file <passwordFilePath>)] [(-u <username> | --username <username>)] [(-pw <password> | --password <password>)] <command> [<args>]
  • Tarball installations: Execute the command from install_location/bin
  • If a username and password for RMI authentication are set explicitly in the cassandra-env.sh file for the host, then you must specify credentials.

    The repair and rebuild commands can affect multiple nodes in the cluster.

    Most nodetool commands operate on a single node in the cluster if -h is not used to identify one or more other nodes. If the node from which you issue the command is the intended target, you do not need the -h option to identify the target; otherwise, for remote invocation, identify the target node, or nodes, using -h.

Getting nodetool help 

nodetool help 
Provides a listing of nodetool commands.
nodetool help command name 
Provides help on a specific command. For example
$ nodetool help upgradesstables