Other features of Couchbase, such as the ability to PREPEND and APPEND values onto existing items, allow for high performance event tracking. Couchbase is also well suited as a aggregation backend, where events need to be consolidated for fast, real-time analysis.

For example, if your application needs to process the "firehose" of events from high-scale conversation services such as Twitter, such as by matching user interest in terms (eg, user-1234 is interested in conversations about "worldcup" and "harrypotter"), Couchbase can be used as the database for fast topic to subscriber matching, allowing your application to quickly answer, "who is interested in event X?"