MYSQL生产场景读写分离
M --------à S
单向同步为保持数据一致性,只能在M上写入数据
方法:
1、从库,连接用户授权上控制
2、Web程序写指向主,读指向从
3、让从库只能读不能写(read-only)
生产授权方案1:
主库:grant select,delete,insert,update on *.*to rep@’%’ identified by ‘dongliqiang’;
从库:grant select on *.* to rep@’%’ identifiedby ‘dongliqiang’;
my.cnf 忽略授权表
binlog-ignore-db=mysql
binlog-ignore-db=information_schema
binlog-ignore-db=performance_schema
生产授权方案2:
主库:grant select,delete,insert,update on *.*to rep@’%’ identified by ‘dongliqiang’;
从库:grant select,delete,insert,update on *.*to rep@’%’ identified by ‘dongliqiang’;
REVOKE update,insert,delete on *.* fromdonglq@’%’;
生产授权方案3:
主库:grant select,delete,insert,update on *.*to rep@’%’ identified by ‘dongliqiang’;
从库:grant select,delete,insert,update on *.*to rep@’%’ identified by ‘dongliqiang’;
REVOKE update,insert,delete on *.* fromdonglq@’%’;
从库my.cnf配置文件增加read-only或者在启动mysql时增加-—read-only参数
[mysqld]
read-only
replication的slave端还有6个参数
1、--replication-do-db 设定需要复制的数据库以逗号(,)分割
2、--replication-ignore-db 设定需要排除的数据库以逗号(,)分割
3、--replication-do-table 设定需要复制的表以逗号(,)分割
4、--replication-ignore-table 设定需要排除的表以逗号(,)分割
5、--replication-wild-do-db 等同于1,但可以加通配符
6、--replication-wild-ignore-db等同于2,但可以加通配符
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原文地址:http://6207422.blog.51cto.com/6197422/1978796