Use for the Couchbase Server product only (NOT CouchDB or Couchbase Lite)
Apache CouchDB is a document-oriented database that can be queried and indexed in a MapReduce fashion
"Couchbase looks more like a memcache server with a persistence layer powered by couchdb and maybe it does not fit your needs"
from question "CouchBase mixed with Memcached, loss of most CouchDB philosophies and functionality?"
"I d like to add that couchbase is a faster and more scalable option than couchdb the 2.0 version introduces views at a high level it s a distributed memcached membase server merged with couchdb but of course more sophisticated than just mashing them together"
from question "CouchDb - MongoDb and NoSQL Databases Comparision (working with XML Documents)"
"Couchbase btw also uses binary replication mechanism which will be more efficient than couchdb as long as the couchdb protocol is not utilized for bidirectional data exchange and conflict resolution"
from question "CouchDB for widely scattered sites"