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Nysql数据库同步复制

Jun 07, 2016 pm 03:35 PM
mysql Synchronize copy database

MySQL 从 3.23.15 版本以后提供数据库复制功能。利用该功能可以实现两个数据库同步,主从模式,互相备份模式的功能。 数据库同步复制功能的设置都在 mysql 的设置文件中体现。mysql 的配置文件(一般是my.cnf),在 unix 环境下在 /etc/mysql/my.cnf 或者在 m

MySQL 从 3.23.15 版本以后提供数据库复制功能。利用该功能可以实现两个数据库同步,主从模式,互相备份模式的功能。

  数据库同步复制功能的设置都在 mysql 的设置文件中体现。mysql 的配置文件(一般是my.cnf),在 unix 环境下在 /etc/mysql/my.cnf  或者在 mysql 用户的 home 目录下的 my.cnf。

  window 环境中,如果 c: 根目录下有 my.cnf 文件则取该配置文件。当运行 mysql 的 winmysqladmin.exe 工具时候,该工具会把 c: 根目录下的 my.cnf  命名为 mycnf.bak。并在 winnt 目录下创建 my.ini。mysql 服务器启动时候会读该配置文件。所以可以把 my.cnf 中的内容拷贝到 my.ini 文件中,用 my.ini 文件作为 mysql 服务器的配置文件。

  设置方法:

  设置范例环境:

  操作系统:window2000 professional

  mysql:4.0.4-beta-max-nt-log

  A ip:10.10.10.22

  B ip:10.10.10.53

  A:设置

  1.增加一个用户作为同步的用户帐号:

GRANT FILE ON *.* TO backup@'10.10.10.53' IDENTIFIED BY ‘1234’

  2.增加一个数据库作为同步数据库:

create database backup

  B:设置

  1.增加一个用户作为同步的用户帐号:

GRANT FILE ON *.* TO backup@'10.10.10.22' IDENTIFIED BY ‘1234’

  2.增加一个数据库作为同步数据库:

create database backup

  主从模式:A->B

  A 为 master

  修改 A mysql 的 my.ini 文件。在 mysqld 配置项中加入下面配置:

server-id=1
#设置需要记录log,可以设置
log-bin=c:/mysql/bak/mysqllog
#设置日志文件的目录,
#其中mysqllog是日志文件的名称,mysql将建立不同扩展名,文件名为mysqllog的几个日志文件。
binlog-do-db=backup #指定需要日志的数据库

  重起数据库服务。

  用 show master status 命令看日志情况。

  B 为 slave

  修改B mysql 的 my.ini 文件。在mysqld配置项中加入下面配置:

server-id=2
master-host=10.10.10.22
master-user=backup
#同步用户帐号
master-password=1234
master-port=3306
master-connect-retry=60
#预设重试间隔60秒
replicate-do-db=backup
#告诉slave只做backup数据库的更新

  重起数据库

  用 show slave status 看同步配置情况。

  注意:由于设置了slave 的配置信息,mysql 在数据库目录下生成 master.info,所以如有要修改相关 slave 的配置要先删除该文件。否则修改的配置不能生效。

  双机互备模式。

  如果在 A 加入 slave 设置,在 B 加入 master 设置,则可以做 B->A 的同步。

  在A的配置文件中 mysqld 配置项加入以下设置:

master-host=10.10.10.53
master-user=backup
master-password=1234
replicate-do-db=backup
master-connect-retry=10

  在B的配置文件中 mysqld 配置项加入以下设置:

log-bin=c:/mysql/log/mysqllog
binlog-do-db=backup

  注意:当有错误产生时 *.err 日志文件。同步的线程退出,当纠正错误后要让同步机制进行工作,运行 slave start 。

  重起 AB 机器,则可以实现双向的热。

  测试:

  向 B 批量插入大数据量表 AA(1872000)条,A 数据库每秒钟可以更新 2500 条数据。

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