Can someone help me summarize what couchbase is and what it does?
Couchbase is a document oriented database that allows you to logically store documents / key - value pairs in
what are called buckets. Buckets are isolated virtual data containers that are found within couchbase clusters. Clusters are numerous instances of couchbase servers or Nodes that exist in the database.
(also How many buckets to one node?)
By using the couchbase cluster instances and corresponding connection strings, you can access buckets specific to that cluster instance and perform operations via couchbase query language n1ql.
SDK : PHP