[rudasn]

Definitely more complicated than a key value store, or sqlite, more like a distributed document database with (optional) map/reduce views (indeces) and more recently mongo-like indeces.

Best use case though, for me, is key/value durable data storage that you can sync (two ways, no need for master).

As for performance, its pretty fast, but not redis fast as data is written on disk using btree indeces. Retrieving multiple values (documents) with similar looking keys (ids) can be quite fast.