mysql AB 复制

实验环境    rhel6.3 

mysql-5.1.61-4.el6.x86_64

master     192.168.1.92

slave1       192.168.1.94

slave2        192.168.1.93

注意:在同步之前确保 master 与 slave 上的数据一致性。

一对多:如果写操作较少,而读操作很多时,可以采取这种结构。你可以将读操作分布到其它的 slave,从而减小
master 的压力。

master && slave1 && slave2都要安装mysql && mysql-server   

#yum install -y mysql mysql-server

(1)master配置

#/etc/init.d/mysqld start

#vim /etc/my.cnf

server-id=1
log-bin=mysql.bin
binlog-do-db=test

#/etc/init.d/mysqld restart

创建同步账户，并且给予权限

mysql> grant replication slave, reload, super on *.* to username@'192.168.1.94' identified by 'password';

mysql> flush privileges;

mysql> show master status;

(2)slave1配置

#vim /etc/my.cnf

server-id=2

#/etc/init.d/mysqld start

mysql> change master to master_host='192.168.1.92', master_user='username', master_password='password', master_log_file='mysql-bin.000001', master_log_pos=106;

mysql> slave start;

mysql> show slave status\G;

        Slave_IO_Running: Yes
        Slave_SQL_Running: Yes      ###如果都是 yes,表示从库的 I/O,Slave_SQL 线程都正确开启.表明数据库正在同步

线性操作：

(1)master

#mysqldump -predhat test > test.bak

#scp test.bak 192.168.1.93:

(2)slave2

# mysql -pyangqi test < test.bak

(3)slave1

#vim /etc/my.cnf

添加 

        slave1log-bin=mysql.bin
        binlog-do-db=test

        log-slave-updates

/etc/init.d/mysqld restart

(3)slave1

mysql> grant replication slave, reload, super on *.* to user@'192.168.1.93' identified by 'passwd';

mysql> flush privileges;

mysql> show master status;

(4)slave2

#vim /etc/my.cnf

server-id=3

#/etc/init.d/mysqld restart

(5)slave2

mysql> change master tp master_host='192.168.1.94', master_user='user', master_password='passwd', master_log_file='mysql-bin.000001', master_log_pos=106;

mysql> slave start;

mysql> show slave status\G;