https://developer.couchbase.com/documentation/server/current/introduction/intro.html

https://developer.couchbase.com/documentation/server/5.1/concepts/concepts-intro.html

Couchdb can be used in -

• managed cache tier

• a key-value store

• a document database

• Node A Couchbase Server intance

• Cluster A scalable, networked set of nodes, sharing distributed buckets

• Bucket A logical keyspace of uniquely keyed documents, evently distributed across acluster

• Document A uniquely keyed document within bucket

Data in Couchbase Server can be either JSON documents or binary format.

• Key-Value