Adding nodes to Cassandra Cluster

Question

I have a 1 node - 1 cluster Cassandra running on my local machine. I want to see how Cassandra scales up, when I simply add the second node to the same cluster. The second node that I am adding will also run from my local machine.

I have been trying to lookup a lot of approaches to do this, but can't find any. Any simple way through which I can add second instance of Cassandra to my cluster?

Answer 1

The act of adding a second node is known as bootstrapping. The procedure is straightforward:

• Make sure the cluster names match in cassandra.yaml

• Point the new (joining) node to the cluster using the seeds setting in the yaml

• Start cassandra, it will join.

This is described in detail online, but one of the easiest ways to see it in action is using ccm , which is a tool many cassandra developers use to setup fake clusters on their local computers.

Currently (all versions up to 3.9), Cassandra's unique ID is an IP - you can only have one instance per IP. If you need more than one cassandra instance per computer, you need to use multiple IPs.