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Apache CouchDB is an open-source document-oriented NoSQL database, implemented in Erlang. CouchDB uses multiple formats and protocols to store, transfer, and process its data. It uses JSON to store data, JavaScript as its query language using MapReduce , and HTTP for an API .
Apache CouchDB uses a simple, HTTP-based multi-master replication system built from its use of an append-only data-store and use of Multiversion Concurrency Control (MVCC). Each document contains a revision ID, so every record stores the evolutionary timeline of all previous revision IDs leading up to itself—which provides the foundation of ...
MarkLogic Server – a bit of this is described in [17] MemSQL; Microsoft SQL Server – when using READ_COMMITTED_SNAPSHOT, starting with SQL Server 2005 [18] MonetDB [19] MongoDB – when used with the WiredTiger [20] storage engine; MySQL – when used with InnoDB, [21] [22] Falcon, [23] or Archive storage engines; NuoDB; ObjectDB; ObjectStore
Without concurrency control, if someone is reading from a database at the same time as someone else is writing to it, it is possible that the reader will see a half-written or inconsistent piece of data.
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 [11] and an edition for commercial use. [12] Couchbase Server builds are available for Ubuntu, Debian, Red Hat, SUSE, Oracle Linux, Microsoft Windows and macOS ...
The central concept of a document-oriented database is the notion of a document.While each document-oriented database implementation differs on the details of this definition, in general, they all assume documents encapsulate and encode data (or information) in some standard format or encoding.
Cloudant is an IBM software product, which is primarily delivered as a cloud-based service. Cloudant is a non-relational, distributed database service of the same name. Cloudant is based on the Apache-backed CouchDB project and the open source BigCouch pro
Hoodie uses CouchDB to store data for the application. If the application is offline and cannot access the CouchDB database, data is stored locally on the device in the offline PouchDB database. The data will later be synced to CouchDB when the connection to the server is re-established, using CouchDB's database synchronisation feature. [7]