NODETOOL

Apache Cassandra is a popular eventually consistent data store. Its distributed nature and replication under an eventually consistent model makes it susceptible to possible complexities at run time. Having a few tools to manage and monitor the Cassandra clusters therefore comes in handy. One such command-line utility is nodetool. The nodetool utility can be run as follows:

bin/nodetool

Running it without any parameters prints out the most common choices available as command-line options. Cassandra’s distributed nodes form a ring where each node in the ring contains data that maps to a certain set of ordered tokens. All keys are hashed to tokens via MD5. To get the status of a Cassandra ring, simply run the following command:

bin/nodetool -host <host_name or ip address> ring