分享一次生产MySQL数据库主备切换演练

2025-11-04 19:16:20分类：数据库阅读(62697)

概述

一般生产环境都需要定期去做一次mysql数据库主备切换演练，分享这里简单记录一下，次生产后面再演示一下备份恢复的数据一些演练工作。

1、高防服务器库主查看主库状态

show processlist; Master has sent all binlog to slave; waiting for binlog to be updated show master status \G

2、备切查看从库状态

show processlist; show slave status \G

3、换演从库停止 IO_THREAD 线程

stop slave IO_THREAD; show processlist; show slave status \G

4、分享从库切换为主库

stop slave; reset master; reset slave all; show master status \G

5、b2b供应网次生产激活帐户

SELECT DISTINCT CONCAT(User: ,数据user,@,host,;) AS query FROM mysql.user; GRANT REPLICATION SLAVE ON *.* TO repl@% IDENTIFIED BY xxx; FLUSH PRIVILEGES;

6、切换原有主库为从库(原有主库执行)

reset master; reset slave all; CHANGE MASTER TO MASTER_HOST=1xxx,库主 MASTER_USER=repl, MASTER_PASSWORD=xxx, MASTER_PORT=3306, MASTER_LOG_FILE=mysql-bin.000001, MASTER_LOG_POS=589;

7、检查主库

SHOW PROCESSLIST; show master status \G

8、备切启动从库

SHOW PROCESSLIST; start slave; show slave status \G

9、云南idc服务商换演MySQL主从测试

9.1插入数据 9.1.1创建测试表并插入数据mysql> create table test123(id int(4)); Query OK,分享 0 rows affected (0.01 sec) mysql> insert into test123 values(1); Query OK, 1 row affected (0.00 sec) mysql> insert into test123 values(2); Query OK, 1 row affected (0.00 sec) mysql> insert into test123 values(3); Query OK, 1 row affected (0.00 sec) mysql> insert into test123 values(4); Query OK, 1 row affected (0.00 sec)