MySQL双向复制(主主模式) 环境: A: 192.168.1.1 没有数据 B: 192.168.1.2 没有数据 在A的[mysqld]字段下增加: auto-
MySQL双向复制(主主模式)
环境:
A: 192.168.1.1 没有数据
B: 192.168.1.2 没有数据
在A的[mysqld]字段下增加:
auto-increment-increment = 2 (增长值) A上就会 1,3,5,7这样增长
auto-increment-offset = 1 (初始值)
在B的[mysqld]字段下增加:
auto-increment-increment = 2 (增长值) B上就会2,4,6,8这样增长
auto-increment-offset = 2 (初始值)
因为是双向备份,可能产生主键重复等问题,,添加这两个参数防止主键重复
注意:server-id = 1 改成 server-id = 2
重启数据库
在A上
mysql> grant replication slave on *.* to 'beifen'@'192.168.1.2' identified by '123'; 创建 beifen用户,密码设置为123 并授权给192.168.1.2使用。
在B上
mysql> grant replication slave on *.* to 'beifen'@'192.168.1.1' identified by '123'; 创建 beifen用户,密码设置为123 并授权给192.168.1.1使用。
在A上:
查询主数据库的状态,并记下File和Position的值,
在B上
在A上:
mysql>change master to master_host=’192.168.1.2’,master_user=’beifen’,master_password=’123’,master_log_file=’mysql-bin.000016’ ,master_log_pos=106;
在B上:
mysql>change master to master_host=’192.168.1.1’,master_user=’beifen’,master_password=’123’,master_log_file=’mysql-bin.000010’ ,master_log_pos=257;
在A .、B上分别执行
启动slave同步
mysql > start slave;
在A、B上分别检查主从同步,如果您看到Slave_IO_Running和Slave_SQL_Running均为Yes,则主从复制连接正常。
mysql > show slave status\G

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