Couchbase Server

Membase was developed by several leaders of the memcached project, who had founded a company, NorthScale, to develop a key-value store with the simplicity, speed, and scalability of memcached, but also the storage, persistence and querying capabilities of a database. The original membase source code was contributed by NorthScale, and project co-sponsors Zynga and Naver Corporation (then known as NHN) to a new project on membase.org in June 2010.[3]

On February 8, 2011, the Membase project founders and Membase, Inc. announced a merger with CouchOne (a company with many of the principal players behind CouchDB) with an associated project merger. The merged company was called Couchbase, Inc. In January 2012, Couchbase released Couchbase Server 1.8. In September, 2012, Orbitz said it had changed some of its systems to use Couchbase.[4] On December 2012, Couchbase Server 2.0 (announced in July 2011) was released and included a new JSON document store, indexing and querying, incremental MapReduce and replication across data centers.[5][6]

Every Couchbase node consists of a data service, index service, query service, and cluster manager component. Starting with the 4.0 release, the three services can be distributed to run on separate nodes of the cluster if needed. In the parlance of Eric Brewer’s CAP theorem, Couchbase is normally a CP type system meaning it provides consistency and partition tolerance, or it can be set up as an AP system with multiple clusters.

Couchbase Server is a packaged version of Couchbase's open source software technology and is available in a community edition without recent bug fixes with an Apache 2.0 license[10] and an edition for commercial use.[11] Couchbase Server builds are available for Ubuntu, Debian, Red Hat, SUSE, Oracle Linux, Microsoft Windows and macOS operating systems.

Couchbase has supported software developers' kits for the programming languages .NET, PHP, Ruby, Python, C, Node.js, Java, Go, and Scala.

A query language called the non-first normal form query language, N1QL (pronounced nickel), is used for manipulating the JSON data in Couchbase, just like SQL manipulates data in RDBMS. It has SELECT, INSERT, UPDATE, DELETE, MERGE statements to operate on JSON data. It was announced in March 2015 as "SQL for documents".[12]

The N1QL data model is non-first normal form (N1NF) with support for nested attributes and domain-oriented normalization. The N1QL data model is also a proper superset and generalization of the relational model.

{
  "email": "testme@example.org",
  "friends": [
    {"name": "rick"},
    {"name": "cate"}
  ]
}

Couchbase Mobile is a suite of products to provide NoSQL databases and data replication for mobile and embedded devices.[13]

Couchbase Lite (originally TouchDB) provides native libraries for offline-first NoSQL databases with built-in peer-to-peer or client-server replication mechanisms.[14] Sync Gateway manages secure access and synchronization of data between Couchbase Lite and Couchbase Server.[15]

• Brown, MC (June 22, 2012). Getting Started with Couchbase Server (1st edition). O'Reilly Media. p. 88. ISBN 978-1449331061.
• Ostrovsky, David; Haji, Mohammed; Rodenski, Yaniv (November 26, 2015), Pro Couchbase Server 2nd ed. (2nd ed.), Apress, p. 349, ISBN 978-1484211861
• Potsangbam, Henry (November 23, 2015), Learning Couchbase (1st ed.), Packt, p. 202, ISBN 978-1785288593
• Vohra, Deepak (August 3, 2015), Pro Couchbase Development: A NoSQL Platform for the Enterprise (1st ed.), Apress, p. 331, ISBN 978-1484214350
• Sangudi, Gerald; et al. (October 20, 2017), N1QL: A Practical Guide (2nd Edition) (2nd ed.), Self-published, p. 423

• Official website