Couchbase Server is a high-performance NoSQL distributed database with a flexible data model. It scales on commodity hardware to support large data sets with a high number of concurrent reads and writes while maintaining low latency and strong consistency.
Document Database: Access, index, and query documents while taking advantage of integrated caching for high performance data access.
Key/Value Store: Meet high performance requirements for read and write data access while maintaining durability and availability.
Distributed Cache: Provide scalable, low-latency access to large in-memory data sets, optionally via the memcache API and clients."