CouchDB 是一个开源的面向文档的数据库管理系统，可通过 RESTful JavaScript 对象表示法 (JSON) API 访问。 “沙发”一词是“Cluster Of Unreliable Commodity Hardware”的首字母缩写词，它反映了 CouchDB 的目标是高度可扩展，提供高可用性和可靠性，即使在容易出错的硬件上运行时也是如此。 CouchDB 最初是用 C 语言编写的，但在 2008 年 4 月该项目转移到 Erlang OTP 平台进行容错测试。
(CouchDB is an open source document-oriented database management system accessed through a RESTful JavaScript Object Notation (JSON) API. The word "couch" is an acronym for "Cluster Of Unreliable Commodity Hardware", which reflects CouchDB's goal of being highly scalable, providing high availability and reliability, even when running on error-prone hardware. CouchDB was originally written in C, but in April 2008 the project moved to the Erlang OTP platform for fault tolerance testing.)
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