Adding a Node, is straight forward,
1. Generate a token list by using script and so you can get the token range for new node.
2. Download the cassandra software, unpack it and change the cassandra.yaml of three important following parameters
cluster_name: ‘geek_cluster’
seeds: “127.0.0.1, 127.0.0.2,127.0.0.3”
listen_address: 127.0.0.4
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