【Monogdb】MongoDB的介绍以及同类数据库的对比
前期已经写了大约50余篇关于Mongodb数据库学习的博客，现在重新其他数据，把不全面的地方补充一下；今天补充的内容是Mongodb数据库是神马东东以及同类数据库中为什么它能脱颖而出； 一、基本介绍 Mongodb是一个高性能、开源、无模式的文档型数据库，使用C开
前期已经写了大约50余篇关于Mongodb数据库学习的博客，现在重新其他数据，把不全面的地方补充一下；今天补充的内容是Mongodb数据库是神马东东以及同类数据库中为什么它能脱颖而出；
一、基本介绍
Mongodb是一个高性能、开源、无模式的文档型数据库，使用C++开发，是当前Nosql数据库产品中最热门的一种。这 里说到nosql数据库，就简单描述一下什么是nosql。 nosql（not only sql非关系型数据库）的主要特点是非关系型的、分布式、开源的、水平扩展的。nosql的原始目的是为了大规模web应用，通常应用如模式自由、支持简单复制、简单的API、最终的一致性和大容量数据等。
nosql的主要解决三个需求:
对数据库高并发读写的需求，往往要达到每秒上万次读写请 对海量数据的高效率存储和访问的需求，大型社交网站，一个月就能产生2.5亿条用户数据对数据库的高可扩展性和高可用的需求二、nosql数据库的种类以及特性
nosql根据数据的存储模式和特点分为好多类： 具体见图引自于《Mongodb管理和开发精要》：
三、mongodb特点和功能
特点主要是：面向集合存储，模式自由，支持动态查询，支持完全索引，支持复制和故障恢复、自动处理碎片主要功能：面向集合的存储，动态查询，完整的索引支持，查询监视，复制以及自动故障转移，高效的传统存储方式，自动分片以及支持云级别的伸缩性。
四、适用场合
网站数据、缓存、大尺寸、低价值的数据，高伸缩型的场景，用于对象以及json数据的存储，五、应用案例
淘宝网、视觉中国网站、大众点评网、sourceforge.net等网站
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