MYSQL5.5主从配置:A->B->C_MySQL
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MYSQL5.5主从配置:A->B->C
A(端口3307)->B(端口3308)->C(端口3309)
一、配置文件
A(my.cnf):
#配一个唯一的ID编号
server-id=1
#打开binlog
log-bin
log_slave_updates
binlog_format=row
#配置自增偏移量
auto_increment_increment=3
auto_increment_offset=1
B(my.cnf):
#配一个唯一的ID编号
server-id=2
#打开binlog
log-bin
log_slave_updates
binlog_format=row
#配置自增偏移量
auto_increment_increment=3
auto_increment_offset=2
# 只读
read-only
C(my.cnf):
#配一个唯一的ID编号
server-id=3
#打开binlog
log-bin
log_slave_updates
binlog_format=row
#配置自增偏移量
auto_increment_increment=3
auto_increment_offset=3
# 只读
read-only
二、命令行
A:
1、重置master状态: RESET MASTER;
2、授权同步用户: GRANT REPLICATION SLAVE ON *.* TO 'repli_user'@'%' IDENTIFIED BY 'repli_pwd';
同步用户名:repli_user,同步用户密码:repli_pwd,有REPLICATION SLAVE的权限IP:%(生产中使用精确IP)
3、备份A库所有数据: mysqldump -uroot -p** -P3307 -A -E -R --master-data=1 > master_A.sql
B:
1、重置slave状态: RESET SLAVE;
2、重置master状态: RESET MASTER;
3、授权同步用户: GRANT REPLICATION SLAVE ON *.* TO 'repli_user'@'%' IDENTIFIED BY 'repli_pwd';
4、同步参数配置: CHANGE MASTER TO MASTER_HOST='localhost',MASTER_USER='repli_user',MASTER_PASSWORD='repli_pwd',MASTER_PORT=3307;
5、导入主库数据: mysql -uroot -p** -P3307
6、开启同步: start SLAVE;
7、备份B库所有数据: mysqldump -uroot -p** -P3308 -A -E -R --master-data=1 > master_B.sql
C:
1、重置slave状态: RESET SLAVE;
2、同步参数配置: CHANGE MASTER TO MASTER_HOST='localhost',MASTER_USER='repli_user',MASTER_PASSWORD='repli_pwd',MASTER_PORT=3308;
3、导入主库数据: mysql -uroot -p** -P3309
4、开启同步: start SLAVE;
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