One of the top attributes of Couchbase Server is its simplicity when it comes to deploying and managing a cluster. Changing the topology of a cluster can be done simply within couchbase through a few actions and few states AND that's what I will present in this post.
Every node is identical in Couchbase Server in the binaries it carries and services it provides. As more nodes get added to the cluster, they mostly inherit settings from the first node, though you have options to configure certain settings per node like data file location.
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