CouchDB和Redis之间的区别

1. CouchDB：
Apache CouchDB是面向开源文档的NoSQL数据库，它使用多种格式和协议来存储，传输和处理其数据，它使用JSON来存储数据，使用JavaScript作为其使用MapReduce的查询语言以及使用HTTP作为API。它由Apache Software Foundation开发，最初于2005年发布。它是用Erlang编写的。

2. Redis：
Redis代表Remote Dictionary Server，它是一个内存中数据结构项目，实现了具有可选持久性的分布式内存中键值数据库。 Redis由Redis实验室开发，最初于2009年5月10日发布。它是用ANSI和C语言编写的。 Redis提供了内存效率，快速的操作速度，高可用性，并提供了一些功能，例如可调性，复制，集群等。

CouchDB和Redis之间的区别：

S.No.	COUCHDB	REDIS
1.	It was developed by Apache Software Foundation and initially released in 2005.	It was developed by Redis labs and initially released on May 10, 2009.
2.	It is written in Erlang.	It is written in ANSI and C languages.
3.	The primary database model for CouchDB is Document Store.	The primary database model for Redis is Key-Value Store.
4.	It supports secondary indexes via views only.	It supports secondary indexes with RediSearch module only.
5.	In CouchDB, there is no predefined datatypes.	It supports predefined datatypes.
6.	The Server-side scripting in CouchDB is through JavaScript.	The Server-side scripting in Redis is through Lua.
7.	It supports Map Reduce method.	It does not support Map Reduce method.
8.	It does not have in-memory capabilities.	It have in-memory capabilities.
9.	It supports both Master-Slave Replication and Master-Master Replication.	It supports both Master-Slave Replication and Multi-Master Raeplication.
10.	Server operating systems for CouchDB are Android, BSD, Linux, OS X, Solaris and Windows	Server operating systems for Redis are BDS, Linux, OS X and Windows.
11.	Famous companies like Twinkl Educational Publishing, Merrill Corporation, ASOS.com Limited, Owler, Inc., etc use Redis.	Famous companies like Akamai Technologies, Hothead Games, Inc., GenCorp Technologies, Vivint Solar, etc uses CouchDB.