Apache CouchDB

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Apache CouchDB is a distributed, fault-tolerant and schema-free document-oriented database accessible via a RESTful HTTP/JSON API. Among other features, it provides robust, incremental replication with bi-directional conflict detection and resolution, and is queryable and indexable using a table-oriented view engine with JavaScript acting as the default view definition language.
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{{SeeWikipedia}}
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[[Image:Apache-CouchDB-logo.png|right|Apache CouchDB]]
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Apache CouchDB
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==简介==
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CouchDB是一个文档数据库；它是一个支持复制的（Replecated）文档数据库，具有REST接口，也就是说可以在HTTP上，用标准的GET、PUT、POST去访问。而且它用JavaScript作为查询语言去建立数据视图（View）。在SQL数据库里，你要定义各种表和表中的数据类型及大小，CouchDB不一样，它是没有Schema的。在CouchDB里，每个文档都是独立的对象，可以是任意的 JSON结构。这是技术上的表述。那么它的优点在哪里呢？它有利于构建很多协作型的应用，很多Web应用都是围绕着文档、上下文、任务、Bug报告，诸如此类的东西。这些就是CouchDB最擅长的方面。
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==功能==
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相似项目: [[MongoDB]]
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CouchDB和Lotus Notes最接近, 其核心就是文档模型.
 
[[Image:Apache-CouchDB-Sketch.png|right|thumb|Apache CouchDB Sketch]]
 
[[Image:Apache-CouchDB-Sketch.png|right|thumb|Apache CouchDB Sketch]]
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CouchDB is written in [[Erlang]], but can be easily accessed from any environment that provides means to make HTTP requests. There are a multitude of third-party client libraries that make this even easier for a variety of programming languages and environments.
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[http://www.infoq.com/cn/interviews/CouchDB-Damien-Katz-cn CouchDB创造者Damien Katz畅谈CouchDB]
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==Install==
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==指南==
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===[[Docker]]===
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[https://github.com/apache/couchdb-docker Apache CouchDB Docker]
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===Windows===
 
===Windows===
 
先安装 Erlang, 再安装 CouchDB
 
先安装 Erlang, 再安装 CouchDB
第10行： 第25行：
 
访问  http://localhost:5984/_utils/index.html
 
访问  http://localhost:5984/_utils/index.html
  
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更多细节: http://wiki.apache.org/couchdb/Installing_on_Windows  
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更多细节: http://wiki.apache.org/couchdb/Installing_on_Windows
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==Database==
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A CouchDB database is a flat collection of these documents.
 
==CouchDB Document==
 
==CouchDB Document==
 
A CouchDB document is simply a [[JSON]] object.
 
A CouchDB document is simply a [[JSON]] object.
  
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This is an example document:
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A CouchDB document is an object that consists of named fields. Field values may be strings, numbers, dates, or even ordered lists and associative maps. An example of a document would be a blog post:
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{
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  "_id":"some_doc_id",
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"Subject": "I like Django"
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  "_rev":"D1C946B7",
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"Author": "Allen"
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  "Subject":"I like Plankton",
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"PostedDate": "5/23/2009"
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  "Author":"Rusty",
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"Tags": ["Python", "Django", "Framework"]
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  "PostedDate":"2006-08-15T17:30:12-04:00",
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"Body": "Django is a high-level Python Web framework that encourages rapid development and clean, I like Django."
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  "Tags":["plankton", "baseball", "decisions"],
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  "Body":"I decided today that I don't like baseball. I like plankton."
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==CouchDB Views==
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Views are the primary tool used for querying and reporting on CouchDB documents. There are two different kinds of views: permanent and temporary views.
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Views are defined with Javascript functions. Here is the very simplest function:
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function(doc) {
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  emit(null, doc);
 
  }
 
  }
  
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==Node.js==
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默认的[http://docs.huihoo.com/apache/couchdb/2.1/query-server 查询服务器]使用[[JavaScript]]编写，运行在 Mozilla [[SpiderMonkey]]。
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[[MongoDB]] 也使用 SpiderMonkey 作为服务端 JavasScript 执行引擎。
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[[Node.js]]查询服务器
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npm install -g couchjs
  
 
==Python==
 
==Python==
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[[Image:couchdb-python.png|right]]
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*[[couchdb-python|CouchDB Python Library]]
 
*[[Couchdbkit]]
 
*[[Couchdbkit]]
 
*[http://www.eflorenzano.com/blog/post/using-couchdb-django/ Using CouchDB with Django]
 
*[http://www.eflorenzano.com/blog/post/using-couchdb-django/ Using CouchDB with Django]
 
*[http://lethain.com/entry/2008/aug/18/an-introduction-to-using-couchdb-with-django/ An Introduction to Using CouchDB with Django]
 
*[http://lethain.com/entry/2008/aug/18/an-introduction-to-using-couchdb-with-django/ An Introduction to Using CouchDB with Django]
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==Links==
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*http://couchdb.apache.org/
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==分发版==
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*[https://github.com/cloudant/bigcouch BigCouch] A Highly Available, Fault-tolerant, Clustered Version of Apache CouchDB，不再更新，代码合并到CouchDB。
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*[https://www.ibm.com/analytics/us/en/technology/cloud-data-services/cloudant/ IBM Cloudant]
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==用户==
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[https://cwiki.apache.org/confluence/display/COUCHDB/CouchDB+in+the+wild CouchDB in the wild]
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*[[Hyperledger Project]] [https://www.hyperledger.org/hyperledger-fabric-1-0 使用CouchDB作为状态存储]
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*[https://cloudant.com/ IBM Cloudant]
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*[[dotCloud]] open-source cloud federation platform
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*[[Ajatus CRM]] A CRM that runs as a local Ajax web application
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*[[Couchit]] minimal site creator
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*http://scratchpad.cmlenz.net/
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==图书==
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*[http://book.huihoo.com/couchdb-the-definitive-guide/ 自由图书 《CouchDB: The Definitive Guide》]
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==图集==
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<gallery>
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image:key-value-wide-row-document-relational-graph.png|5类数据库
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image:CAP-Consistency-Apache-CouchDB.png|CAP一致性
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image:Apache-CouchDB-Request.png|请求
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image:MVCC-Apache-CouchDB.png|MVCC
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image:Apache-CouchDB-Synchronization-Conflicts.png|同步冲突
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image:apache-couchdb.png|Project Fauxton
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</gallery>
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==链接==
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*[http://couchdb.apache.org/ CouchDB官网]
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*[https://github.com/apache/couchdb CouchDB @ GitHub]
 
*http://wiki.apache.org/couchdb/
 
*http://wiki.apache.org/couchdb/
 
*http://groups.google.com/group/couchdb
 
*http://groups.google.com/group/couchdb
 
*http://docs.huihoo.com/apache/couchdb/
 
*http://docs.huihoo.com/apache/couchdb/
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*http://download.huihoo.com/apache/couchdb/
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*[http://www.ibm.com/developerworks/cn/opensource/os-cn-couchdb/ 面向文档的数据库 CouchDB]
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[[category:NoSQL]]
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[[category:database]]
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[[category:big data]]
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[[category:erlang]]
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[[category:apache]]
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[[category:huihoo Foundation]]

2022年2月13日 (日) 04:10的最后版本

Wikipedia-35x35.png 您可以在Wikipedia上了解到此条目的英文信息 Apache CouchDB Thanks, Wikipedia.
Apache CouchDB

Apache CouchDB

目录

[编辑] 简介

CouchDB是一个文档数据库；它是一个支持复制的（Replecated）文档数据库，具有REST接口，也就是说可以在HTTP上，用标准的GET、PUT、POST去访问。而且它用JavaScript作为查询语言去建立数据视图（View）。在SQL数据库里，你要定义各种表和表中的数据类型及大小，CouchDB不一样，它是没有Schema的。在CouchDB里，每个文档都是独立的对象，可以是任意的 JSON结构。这是技术上的表述。那么它的优点在哪里呢？它有利于构建很多协作型的应用，很多Web应用都是围绕着文档、上下文、任务、Bug报告，诸如此类的东西。这些就是CouchDB最擅长的方面。

[编辑] 功能

相似项目: MongoDB

CouchDB和Lotus Notes最接近, 其核心就是文档模型.

Apache CouchDB Sketch

CouchDB创造者Damien Katz畅谈CouchDB

[编辑] 指南

[编辑] Docker

Apache CouchDB Docker

[编辑] Windows

先安装 Erlang, 再安装 CouchDB

启动 C:\erl5.7.2\bin\couch_start.bat

访问 http://localhost:5984/_utils/index.html

更多细节: http://wiki.apache.org/couchdb/Installing_on_Windows

[编辑] Database

A CouchDB database is a flat collection of these documents.

[编辑] CouchDB Document

A CouchDB document is simply a JSON object.

A CouchDB document is an object that consists of named fields. Field values may be strings, numbers, dates, or even ordered lists and associative maps. An example of a document would be a blog post: 

"Subject": "I like Django"  
"Author": "Allen"  
"PostedDate": "5/23/2009"  
"Tags": ["Python", "Django", "Framework"]
"Body": "Django is a high-level Python Web framework that encourages rapid development and clean, I like Django."

[编辑] CouchDB Views

Views are the primary tool used for querying and reporting on CouchDB documents. There are two different kinds of views: permanent and temporary views.

Views are defined with Javascript functions. Here is the very simplest function: 

function(doc) {
  emit(null, doc);
}

[编辑] Node.js

默认的查询服务器使用JavaScript编写，运行在 Mozilla SpiderMonkey。

MongoDB 也使用 SpiderMonkey 作为服务端 JavasScript 执行引擎。

Node.js查询服务器 

npm install -g couchjs

[编辑] Python

Couchdb-python.png

[编辑] 分发版

  • BigCouch A Highly Available, Fault-tolerant, Clustered Version of Apache CouchDB，不再更新，代码合并到CouchDB。
  • IBM Cloudant

[编辑] 用户

CouchDB in the wild

[编辑] 图书

[编辑] 图集

  • 5类数据库

  • CAP一致性

  • 请求

  • MVCC

  • 同步冲突

  • Project Fauxton

[编辑] 链接

来自“http://wiki.huihoo.com/wiki/?title=Apache_CouchDB&oldid=160708”
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