Home Database Mysql Tutorial 搭建MongoDB主从复制(Master-Slave)集

搭建MongoDB主从复制(Master-Slave)集

Jun 07, 2016 pm 04:47 PM

主从复制是MongoDB数据库一种特性,它通过数据备份来提高数据库的容灾能力。但是由于主从复制并不能自动实现故障转移的特性,Mon

  主从复制是MongoDB数据库一种特性,它通过数据备份来提高数据库的容灾能力。但是由于主从复制并不能自动实现故障转移的特性,MongoDB在1.6版本开发了新的复制模式:Replicate Sets。MongoDB建议不要再使用Master-Slave模式对数据进行备份。但是对于学习来说,我们仍可以了解一下MongoDB的主从复制模式。

  1. 从MongoDB官网下载最新版的MongoDB,解压到某个目录。

  2.在MongoDB文件夹下,创建/data/master和/data/slave目录。

  3.启动主节点(Master)的服务器,运行下面的命令:

mongod --dbpath /data/master --port 10000 --master

搭建MongoDB主从复制(Master-Slave)集

  执行完上面的命令后,mongodb会在data/master下生成数据文件和日志文件。

  4.启动从节点(Slave)的服务器,运行下面的命令:

mongod --dbpath /data/slave --port 10001 --slave --source localhost:10000

搭建MongoDB主从复制(Master-Slave)集

  执行完上面命令后,同样会在data/slave下生成数据文件和日志文件,并在local数据库下的sources表下创建与master的关联信息。

  5.测试主从复制(Master-Slave)是否生效。

  使用“mongo localhost:10000”打开Master数据库,插入一条测试语句:

  db.test.find();

  db.test.insert({“host”:“1000”});

  db.test.find();

  使用“mongo localhost:10001”打开Slave数据库,运行db.test.find()会发现查询出来的数据与从Master数据库中查询的数据相同。

  运行db.test.insert({"girl":"lili"}); 则会显示not master。这是因为主从复制模式只允许从Master数据库更新数据,而不允许从Slave数据库更新数据。正因此,当Master发生故障时,,从节点无法转换为主节点的劣势就暴漏了出来。

MongoDB 的详细介绍:请点这里
MongoDB 的下载地址:请点这里

相关阅读:

MongoDB备份与恢复

CentOS编译安装MongoDB

CentOS 编译安装 MongoDB与mongoDB的php扩展

CentOS 6 使用 yum 安装MongoDB及服务器端配置

Ubuntu 13.04下安装MongoDB2.4.3

如何在MongoDB中建立新数据库和集合

MongoDB入门必读(概念与实战并重)

《MongoDB 权威指南》(MongoDB: The Definitive Guide)英文文字版[PDF]

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