MongoDB第一弹
MongoDB( 蒙戈 )介绍: 随着互联网web2.0网站的兴起,传统的关系数据库在应付web2.0网站,特别是超大规模和高并发的SNS类型的web2.0纯动态网站已经显得力不从心,暴露了很多难以克服的问题,而非关系型的数据库(NoSQL)则由于其本身的特点得到了非常迅速
MongoDB( 蒙戈 )介绍:
随着互联网web2.0网站的兴起,传统的关系数据库在应付web2.0网站,特别是超大规模和高并发的SNS类型的web2.0纯动态网站已经显得力不从心,暴露了很多难以克服的问题,而非关系型的数据库(NoSQL)则由于其本身的特点得到了非常迅速的发展。而MongoDB则是NoSQL的一种。MongoDB是一种文件导向数据库管理系统,由C++撰写而成,以此来解决应用程序开发社区中的大量现实问题。2007年10月,MongoDB由10gen团队所发展。2009年2月首度推出。
功能特点:
(1).面向集合
(2).模式自由
(3).文档型
(4).支持动态查询
(5).支持完全索引,包含内部对象
(6).支持复制和故障恢复
(7).使用高效地二进制数据存储,包括大对象(如视频等)
(8).自动 处理碎片,以支持云计算层次的拓展
(9).支持如Python,Haskell,C,C#,CPP,JS,Perl,Java,Ruby语言的驱动程序
(10) .文件存储格式为BSON( JSON的一种二进制存储)
(11).可以通过网络访问
适用场合:
(1).网站数据:MongoDB非常适合实时插入,更新与查询,并且具备王振展实时数据存储所需的复制以及高度伸缩性。
(2).缓存:由于性能高,MongoDB,也适合最为信息基础设施的缓存层,在系统重启后,由MongoDB搭建的持久化缓存层可以避免下层数据源过载。
(3).大尺寸,低价值的数据:使用传统的关系数据库存储一些数据时可能会比较昂贵,在此之前,很多时候程序员往往会选择传统的文件进行存储。
(4).高伸缩的场景:MongoDB非常适合由数十台或者数百台服务器组成的数据库。MongoDB的线路图中已经包含对MapReduce引擎的内置支持。
(5).用于对象及JSON数据的存储:MongoDB的BSON数据格式非常适合文档化格式的存储以及查询。
下载:
MongoDB下载地址: http://www.mongodb.org/
我下载的是windows32的MSI。
安装:
next就可以。
新建:
新建data文件夹,在data里面再建db和log两个子目录。
启动:
进入cmd,到当前MongoDB的bin目录下面,启动 “mongd”(不是mongo),修改db路径。
然后打开浏览器输入localhost:27017,会出现:
最后在cmd中启动mongo.exe,出现:
基本操作:
insert:
find:
update(第一个是条件,第二个参数是变化结果,若是想批量修改,则第四个参数得改成true):
remove(不可撤销 ):

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