Monitoring Cassandra is in many ways similar to how you manage a traditional relational database. The complexity lies in the fact that Cassandra is a distributed database, so you’ll be concerning yourself also with the distribution of data and the balancing of the workload among the nodes of a cluster.
The nodetool utility offers many commands that help you monitor your cluster, and you learned many of these commands in the earlier chapters.
JConsole is a powerful monitoring tool that you can use both from the command line and as a GUI tool.
Cassandra ...