MySQL主从同步架构中你不知道的“坑”
发布时间:2025-05-21 21:22:24
作者:益华网络
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摘要:以下操作征对指定不同步库 1、binlog-format=ROW模式 查看主从的binlog模 mysql>showslavestatusG***********************1.row*************************Slave_IO_State:Waitingformasterto&
以下操作征对指定不同步库
1、binlog-format=ROW模式
查看主从的binlog模
查看从库状态也显示此项配置
1:在忽略不同步的库不存在的情况下
在配置文件指定主从库都不存在的库,然后在主库中创建这个库,测试数据是否同步过去
主库创建数据库
mysql> create database test; Query OK, 1 row affected (0.06 sec) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | sys | | test | +--------------------+ 5 rows in set (0.01 sec)从库查看
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | sys | +--------------------+ 5 rows in set (0.01 sec)结论:发现建库的动作没有被从库同步过来
2:测试主从服务器库存在数据同步情况
目前主从库都存在库test001
[root@mysql-m ~]# mysql -uroot -p -e "show databases;"|grep test001 Enter password: test001 [root@mysql-s ~]# mysql -uroot -p -e "show databases;"|grep test001 Enter password: test001在主库插入数据测试从库同步情况
mysql> use test001; Database changed mysql> create table test ( -> id varchar(10) not null, -> name varchar(10) not null -> ); Query OK, 0 rows affected (0.06 sec) mysql> insert into test values(zhang,man); Query OK, 1 row affected (0.03 sec) mysql> select * from test; +-------+------+ | id | name | +-------+------+ | zhang | man | +-------+------+ 1 row in set (0.00 sec) mysql> select * from test001.test; ERROR 1146 (42S02): Table test001.test doesnt exist mysql> use test001; Database changed mysql> show tables; Empty set (0.00 sec)结论:从库没有表,同样也有数据同步过来
3:征对数据库默认的库同步(如mysql)
replicate-ignore-db = mysql #忽略指定不同步的库测试前的数据
[root@mysql-m ~]# mysql -uroot -p -e "select user,host from mysql.user;" Enter password: +-----------+--------------+ | user | host | +-----------+--------------+ | mysql.sys | localhost | | root | localhost | +-----------+--------------+ [root@mysql-s ~]# mysql -uroot -p -e "select user,host from mysql.user;" Enter password: +-----------+--------------+ | user | host | +-----------+--------------+ | mysql.sys | localhost | | root | localhost | +-----------+--------------+ [root@mysql-m ~]# mysql -uroot -p -e "grant all privileges on *.* to test@localhost identified by 123456;" Enter password: [root@mysql-m ~]# mysql -uroot -p -e "select user,host from mysql.user;" Enter password: +-----------+--------------+ | user | host | +-----------+--------------+ | mysql.sys | localhost | | root | localhost | | test | localhost | +-----------+--------------+ [root@mysql-s ~]# mysql -uroot -p -e "select user,host from mysql.user;" Enter password: +-----------+--------------+ | user | host | +-----------+--------------+ | mysql.sys | localhost | | root | localhost | | test | localhost | +-----------+--------------+结论:此种模式下此配置对默认的库不生效,因此调整配置
replicate-ignore-db = mysql #忽略指定不同步的库 replicate-wild-ignore-table=mysql.% #忽略指定不同步的库的所有表 [root@mysql-m ~]# mysql -uroot -p -e "grant all privileges on *.* to testuser@localhost identified by 123456;" Enter password: [root@mysql-m ~]# mysql -uroot -p -e "select user,host from mysql.user;" Enter password: +-----------+--------------+ | user | host | +-----------+--------------+ | mysql.sys | localhost | | root | localhost | | test | localhost | | testuser | localhost | +-----------+--------------+ [root@mysql-s ~]# mysql -uroot -p -e "select user,host from mysql.user;" Enter password: +-----------+--------------+ | user | host | +-----------+--------------+ | mysql.sys | localhost | | root | localhost | | test | localhost | +-----------+--------------+结论:此种模式下此配置对默认的库进行不同步数据库,需要增加相关表的参数,***测试得出不加replicate-ignore-db = mysql参数,同样对默认的库生效,
2、binlog-format=STATEMENT模式
修改主从库的binlog模式
一起测试不存在的库、存在的库与默认库
replicate-ignore-db = test #忽略指定不同步的库(主从不存在) replicate-ignore-db = test001 #忽略指定不同步的库 replicate-wild-ignore-table=mysql.% #忽略指定不同步的库的所有表1:测试默认库数据同步
mysql> grant all privileges on *.* to user@localhost identified by 123456; Query OK, 0 rows affected, 1 warning (0.03 sec) mysql> select user,host from mysql.user; +-----------+--------------+ | user | host | +-----------+--------------+ | rep | % | | mysql.sys | localhost | | root | localhost | | test | localhost | | user | localhost | +-----------+--------------+ 5 rows in set (0.01 sec) [root@mysql-s ~]# mysql -uroot -p -e "select user,host from mysql.user;" Enter password: +-----------+--------------+ | user | host | +-----------+--------------+ | rep | % | | mysql.sys | localhost | | root | localhost | | test | localhost | +-----------+--------------+结论:在此种模式下,对于默认的库,配置replicate-ignore-db = mysql,对默认的库与库中的表都生效
2:测试主从都不存在的库同步
3:测试主从服务器库已经同步的情况下数据同步(test001)
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