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  • MySQL 主从同步架构中你不知道的“坑”

    以下操作征对指定不同步库

    binlog-format=ROW模式

    1

    查看主从的binlog模式

    mysql> show slave statusG

    *********************** 1. row *************************

    Slave_IO_State: Waiting for master to send event

      Master_Host: 192.168.22.171

      Master_User: rep

      Master_Port: 3306

    Connect_Retry: 60

    Master_Log_File: master-bin.000004

    Read_Master_Log_Pos: 463

    Relay_Log_File: s1.000011

    Relay_Log_Pos: 630

    Relay_Master_Log_File: master-bin.000004

    Slave_IO_Running: Yes

    Slave_SQL_Running: Yes

    Replicate_Do_DB:

    Replicate_Ignore_DB: test

    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' doesn't 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,最后测试得出不加replicate-ignore-db = mysql参数,同样对默认的库生效,

    binlog-format=STATEMENT模式

    2

    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)

    mysql> use test001;

    Database changed

    mysql> create table test001 (

        -> id varchar(10) not null,

        -> name varchar(10) not null

        -> );

    Query OK, 0 rows affected (0.06 sec)

    mysql> insert into test001 values('zhang','man');

    Query OK, 1 row affected (0.11 sec) 

    [root@mysql-m ~]# mysql -uroot -p -e "select * from test001.test001;"

    Enter password:

    +-------+------+

    | id  | name |

    +-------+------+

    | zhang | man  |

    +-------+------+

    [root@mysql-s ~]# mysql -uroot -p -e "select * from test001.test001;"

    Enter password:

    ERROR 1146 (42S02) at line 1: Table 'test001.test001' doesn't exist

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  • 原文地址:https://www.cnblogs.com/duanlinxiao/p/10923104.html
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