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CentOS下 MySQL同步备份

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Jun 07, 2016 pm 05:26 PM

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MySQL支持单向、异步复制，复制过程中一个服务器充当主服务器，而一个或多个其它服务器充当从服务器。主服务器将更新写入二进制日

注释：MySQL支持单向、异步复制，复制过程中一个服务器充当主服务器，而一个或多个其它服务器充当从服务器。主服务器将更新写入二进制日志文件，并维护日志文件的一个索引以跟踪日志循环。服务器在日志中读取的最后一次成功更新的位置。从服务器接收从那时起发生的任何更新，然后封锁并等待主服务器通知下一次更新。在实际项目中，，两台分布于异地的主机上安装有MySQL数据库，两台服务器互为主备，客户要求当其中一台机器出现故障时，另外一台能够接管服务器上的应用，这就需要两台数据库的数据要实时保持一致，在这里使用MySQL的同步功能实现双机的同步复制。

以下是操作实例：

一、环境配置

1、主数据服务端：CentOS release 5.6 mysql-5.0.77-4.el5_5.4 IP：192.168.4.200

2、从数据客户端：CentOS release 5.69 mysql-server-5.0.95-5.el5_9 IP：192.168.4.244

二、在主、从数据库增加同步账号

1、在主库增加一个从库可以登录的账号

MySQL>
GRANT all privileges ON *.* TO tongbu@'192.168.4.244' IDENTIFIED BY '123456';
(注意：tongbu是用于同步的帐号，123456是tongbu的密码)

2、在从库增加一个主库可以登录的账号

MySQL>

GRANT all privileges ON *.* TO tongbu@'192.168.4.200' IDENTIFIED BY '123456';

(注意：tongbu是用于同步的帐号，123456是tongbu的密码)

三、配置数据库参数

1、以root用户登录主库，修改主库my.cnf文件；

[root@jw01 mysql]# vim /etc/my.cnf

[mysqld]下面增加以下的参数；

default-character-set=utf8
log-bin=MySQL-bin
relay-log=relay-bin
relay-log-index=relay-bin-index
server-id=1
master-host=192.168.4.244 #同步服务器的IP
master-user=tongbu #用于同步的帐号
master-password=123456 #用于同步帐号的密码
master-port=3306 #同步服务器的端口
master-connect-retry=30 #同步的时间间隔，单位是秒
binlog-do-db=zhubao #需要同步的库，zhubao、HyDatabase、zentao、collect；
binlog-do-db=HyDatabase
binlog-do-db=zentao
binlog-do-db=collect
replicate-do-db=zhubao
replicate-do-db=HyDatabase
replicate-do-db=zentao
replicate-do-db=collect

2、以root用户登录从库，修改从库my.cnf文件；

[root@jw02 mysql]# vim /etc/my.cnf

[mysqld]下面增加以下的参数；

default-character-set=utf8
log-bin=MySQL-bin
relay-log=relay-bin
relay-log-index=relay-bin-index
server-id=2
master-host=192.168.4.200
master-user=tongbu
master-password=123456
master-port=3306
master-connect-retry=30
binlog-do-db=zhubao
binlog-do-db=HyDatabase
binlog-do-db=zentao
binlog-do-db=collect
replicate-do-db=zhubao
replicate-do-db=HyDatabase
replicate-do-db=zentao
replicate-do-db=collect
slave-net-timeout=60 #当slave从主数据库读取log数据失败
slave-skip-errors=all #忽略错误的参数

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