The nodetool
utility is a command-line utility that comes out of the box with Cassandra. You can access it from $CASSANDRA_HOME/bin/nodetool
. It communicates with JMX to perform operational and monitoring tasks exposed by MBeans. It is much easier to use than JConsole. We have already seen a bit of nodetool
in the previous chapter. The nodetool
utility is a great tool for administration and monitoring. The following section will discuss some of the useful functionalities of nodetool
. Most of the nodetool
commands are obvious and can be easily learned by reading the help text. Unfortunately, there is no help option, but it prints help messages anyway.
The following screenshot shows how to invoke methods via JConsole:
The standard way to execute any command on a Cassandra node using nodetool
is as follows:
nodetool -h CASSANDRA_HOST [-p JMX_PORT -u JMX_USERNAME -pw JMX_PASSWORD] COMMAND
In general, you do not need to provide JMX_PORT
...