标签:varchar exe for man value warnings rop 说明 选择
强烈建议:尽量不要使用本文中的几个参数用作MySQL选择性同步。本文仅是测试,极不推荐生产环境中用以下参数。
测试版本:MySQL 5.7.26
说明:图中最后的都是从库的结论。比如a库的表不执行binlog指的是从库中a库中不会执行主库中binlog中的xx记录。
主库配置文件my.cnf设置:
binlog-do-db=a;
实验如下:
(1) 创建库b,创建库a
主库执行:
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | sys | +--------------------+ 4 rows in set (0.00 sec) mysql> create database a; Query OK, 1 row affected (0.00 sec) mysql> create database b; Query OK, 1 row affected (0.00 sec) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | a | | b | | mysql | | performance_schema | | sys | +--------------------+ 6 rows in set (0.00 sec) mysql> show master status\G *************************** 1. row *************************** File: binlog.000004 Position: 462 Binlog_Do_DB: a Binlog_Ignore_DB: Executed_Gtid_Set: 1 row in set (0.00 sec) mysql> # mysqlbinlog --base64-output=decode-rows -v -v binlog.000004 >> ~/db_01.txt # at 372 #200224 14:18:12 server id 1611343306 end_log_pos 462 CRC32 0x738926e7 Query thread_id=4 exec_time=0 error_code=0 SET TIMESTAMP=1582525092/*!*/; create database a /*!*/; SET @@SESSION.GTID_NEXT= ‘AUTOMATIC‘ /* added by mysqlbinlog */ /*!*/; DELIMITER ; # End of log file /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
从库执行:
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | a | | mysql | | performance_schema | | sys | +--------------------+ 5 rows in set (0.00 sec) mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 172.16.161.134 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: binlog.000004 Read_Master_Log_Pos: 462 Relay_Log_File: relaylog.000006 Relay_Log_Pos: 669 Relay_Master_Log_File: binlog.000004 Slave_IO_Running: Yes Slave_SQL_Running: Yes
结论:主库创建的库,设置了binlog-do-db的库会记录在binlog日志里,而未指定的不会记录在binlog中。
(2) 在a库中创建库a的a表,在库a中创建库b的b表。
主库:
mysql> use a; Database changed mysql> create table a (id int); Query OK, 0 rows affected (0.01 sec) mysql> create table b.b (id int); Query OK, 0 rows affected (0.01 sec) mysql> 主库的binlog日志: use `a`/*!*/; SET TIMESTAMP=1582525459/*!*/; create table a (id int) /*!*/; # at 623 #200224 14:24:29 server id 1611343306 end_log_pos 688 CRC32 0x0ca2b45e Anonymous_GTID last_committed=3 sequence_number=4 rbr_only=no SET @@SESSION.GTID_NEXT= ‘ANONYMOUS‘/*!*/; # at 688 #200224 14:24:29 server id 1611343306 end_log_pos 786 CRC32 0x15eeef53 Query thread_id=4 exec_time=0 error_code=0 SET TIMESTAMP=1582525469/*!*/; create table b.b (id int) /*!*/; SET @@SESSION.GTID_NEXT= ‘AUTOMATIC‘ /* added by mysqlbinlog */ /*!*/; DELIMITER ; # End of log file /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
从库:
mysql> desc a.a; +-------+---------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+---------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | +-------+---------+------+-----+---------+-------+ 1 row in set (0.00 sec) mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 172.16.161.134 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: binlog.000004 Read_Master_Log_Pos: 786 Relay_Log_File: relaylog.000006 Relay_Log_Pos: 830 Relay_Master_Log_File: binlog.000004 Slave_IO_Running: Yes Slave_SQL_Running: No Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 1049 Last_Error: Error ‘Unknown database ‘b‘‘ on query. Default database: ‘a‘. Query: ‘create table b.b (id int)‘
由于a库中的记录都同步到了binlog,而从库中没有b库,所以同步异常。
结论:在a库中的DDL操作都会记录在binlog中。
(3) 在b库中对a库的a表进行DDL
先在从库中创建b库,解决上面同步的报错,这样从库中也有了b库和b库的b表。
mysql> use b; Database changed mysql> alter table a.a add column name varchar(10); Query OK, 0 rows affected (0.02 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> desc a.a; +-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | | name | varchar(10) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+ 2 rows in set (0.00 sec)
查看主库的binlog日志,发现这个操作并没有记录在binlog中。
结论:在b库中进行的DDL操作并不会记录在binlog中。因此从库中也不会执行到这一操作。
(4) 在a库中对b库的表进行DDL
主库: mysql> use a; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> alter table b.b add column name varchar(10); Query OK, 0 rows affected (0.02 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> 主库binlog日志: # at 851 #200224 15:31:20 server id 1611343306 end_log_pos 967 CRC32 0x13c14a93 Query thread_id=4 exec_time=0 error_code=0 SET TIMESTAMP=1582529480/*!*/; alter table b.b add column name varchar(10) /*!*/; SET @@SESSION.GTID_NEXT= ‘AUTOMATIC‘ /* added by mysqlbinlog */ /*!*/; DELIMITER ; # End of log file /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
从库: mysql> desc b.b; +-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | | name | varchar(10) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+ 2 rows in set (0.01 sec) mysql>
同步正常!
小结论:
(1) 使用binlog-do-db参数,指定了什么库,那么在这个库上(use xxx)的DDL操作都会记录到binlog中。
(2) 使用binlog-do-db参数,在未指定的库上执行的DDL语句, 都不会记录在binlog中,尽管是操作执行binlog-do-db执行数据库的DDL。
(1) 在a库中对a库的表进行DML
让保持从库同步主库a库a表。
主库: mysql> use a; Database changed mysql> drop table a; Query OK, 0 rows affected (0.01 sec) mysql> create table a (id int); Query OK, 0 rows affected (0.01 sec) mysql> insert into a values(1); Query OK, 1 row affected (0.01 sec) 从库: mysql> select * from a.a; +------+ | id | +------+ | 1 | +------+ 1 row in set (0.00 sec)
结论:在a库中操作a表会记录在binlog。
(2) 在a库中对b库的表进行DML
主库: mysql> desc b.b; +-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | | name | varchar(10) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+ 2 rows in set (0.01 sec) mysql> use a; Database changed mysql> insert into b.b values(1,‘b‘); Query OK, 1 row affected (0.01 sec) mysql> select * from b.b; +------+------+ | id | name | +------+------+ | 1 | b | +------+------+ 1 row in set (0.00 sec) mysql>
从库: mysql> select * from b.b; Empty set (0.00 sec) mysql>
结论:在binlog-do-db指定的库中操作其它库的DML语句,不会记录在binlog中。
(3) 在b库中对a库的表进行DML
主库: mysql> desc a.a; +-------+---------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+---------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | +-------+---------+------+-----+---------+-------+ 1 row in set (0.00 sec) mysql> use b; Database changed mysql> select * from a.a; +------+ | id | +------+ | 1 | +------+ 1 row in set (0.00 sec) mysql> insert into a.a values(2); Query OK, 1 row affected (0.00 sec) mysql> select * from a.a; +------+ | id | +------+ | 1 | | 2 | +------+ 2 rows in set (0.00 sec) mysql>
主库binlog日志: # at 1622 #200224 16:23:48 server id 1611343306 end_log_pos 1696 CRC32 0x99c73a44 Query thread_id=4 exec_time=0 error_code=0 SET TIMESTAMP=1582532628/*!*/; BEGIN /*!*/; # at 1696 #200224 16:23:48 server id 1611343306 end_log_pos 1737 CRC32 0xfef48115 Table_map: `a`.`a` mapped to number 113 # at 1737 #200224 16:23:48 server id 1611343306 end_log_pos 1777 CRC32 0x5e85445b Write_rows: table id 113 flags: STMT_END_F ### INSERT INTO `a`.`a` ### SET ### @1=2 /* INT meta=0 nullable=1 is_null=0 */ # at 1777 #200224 16:23:48 server id 1611343306 end_log_pos 1808 CRC32 0x602e2c5c Xid = 78 COMMIT/*!*/; SET @@SESSION.GTID_NEXT= ‘AUTOMATIC‘ /* added by mysqlbinlog */ /*!*/; DELIMITER ; # End of log file /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
从库: mysql> select * from a.a; +------+ | id | +------+ | 1 | | 2 | +------+ 2 rows in set (0.00 sec)
结论:binlog中没有use b的记录,操作binlog-do-db指定库的DML语句会被记录到binglog中。
主库配置文件my.cnf设置:
binlog-ignore-db=a;
(1)在b库中创建a库中的表
主库: mysql> use b; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> create table a.a2 (id int); Query OK, 0 rows affected (0.02 sec) 从库: mysql> show tables; +-------------+ | Tables_in_a | +-------------+ | a | | a2 | +-------------+
结论:在非binlog-ignore-db指定的库中执行的DDL语句会记录在binlog中。
(2)在a库中创建b库中的表
主库: mysql> use a; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> create table b.b2 (id int); Query OK, 0 rows affected (0.01 sec) mysql>
从库: mysql> use b; Database changed mysql> show tables; +-------------+ | Tables_in_b | +-------------+ | b | +-------------+ 1 row in set (0.01 sec)
结论:在binlog-ignore-db指定的库中执行的DDL语句都不记录在binlog中。
(1)在b库中对a库的表进行DML操作
主库: mysql> use b; Database changed mysql> insert into a.a2 values(10); Query OK, 1 row affected (0.00 sec) mysql> select * from a.a2; +------+ | id | +------+ | 10 | +------+ 1 row in set (0.00 sec) mysql>
从库: mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 172.16.161.134 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: binlog.000005 Read_Master_Log_Pos: 482 Relay_Log_File: relaylog.000009 Relay_Log_Pos: 689 Relay_Master_Log_File: binlog.000005 Slave_IO_Running: Yes Slave_SQL_Running: Yes mysql> select * from a.a2; Empty set (0.00 sec)
结论:在非binlog-ignore-db指定的库中执行操作binlog-ignore-db指定的库的表DML语句都不记录在binlog中。
(2)在a库中对b库的表进行DML操作
主库:
mysql> use a; Database changed mysql> select * from b.b; +------+------+ | id | name | -----+------+ | 1 | b | +------+------+ 1 row in set (0.00 sec) mysql> insert into b.b values(2,‘b1‘); Query OK, 1 row affected (0.01 sec) mysql> select * from b.b; +------+------+ | id | name | +------+------+ | 1 | b | | 2 | b1 | +------+------+ 2 rows in set (0.00 sec) 从库: mysql> select * from b.b; +------+------+ | id | name | +------+------+ | 2 | b1 | +------+------+ 1 row in set (0.00 sec) mysql>
结论:在binlog-ignore-db指定的库中执行操作非binlog-ignore-db指定的库的表DML语句都会记录在binlog中。
这个是对从库起作用的参数,在从库中配置:
replicate-do-db=a;
(1)在a库中对b库的表进行DDL
主库: mysql> use a; Database changed mysql> create table b.b6 (id int); Query OK, 0 rows affected (0.01 sec) mysql> 从库: mysql> use b; Database changed mysql> show tables; +-------------+ | Tables_in_b | +-------------+ | b6 | +-------------+ 5 rows in set (0.00 sec)
结论:从库会将主库的所有binlog记录同步到relay日志,从库对于在指定replicate-do-db库中执行的DDL语句都会执行。
(2)在b库中对a库的表进行DDL
主库: mysql> use b; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> create table a.a6 (id int); Query OK, 0 rows affected (0.01 sec) 从库: mysql> use a; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> show tables; +-------------+ | Tables_in_a | +------------+ | a | | a1 | | a2 | | a4 | +-------------+
结论:从库会将主库的所有binlog记录同步到relay日志,从库对于在非指定replicate-do-db库中执行的DDL语句都不会执行。
(1)在a库中对b库的表进行DML
主库: mysql> use a; Database changed mysql> insert into b.b6 values(1); Query OK, 1 row affected (0.01 sec) 从库: mysql> select * from b.b6; Empty set (0.00 sec)
结论:从库会将主库的所有binlog记录同步到relay日志,对于非指定replicate-do-db库的DML语句都不会执行。
(2)在b库中对a库的表进行DML
主库: mysql> select * from a.a; +------+ | id | +------+ | 1 | | 2 | +------+ 2 rows in set (0.00 sec) mysql> use b; Database changed mysql> insert into a.a values(3); Query OK, 1 row affected (0.00 sec) mysql> select * from a.a; +------+ | id | +------+ | 1 | | 2 | | 3 | +------+ 3 rows in set (0.00 sec)
从库: mysql> mysql> select * from a.a; +------+ | id | +------+ | 1 | | 2 | | 3 | +------+ 3 rows in set (0.00 sec)
结论:从库会将主库的所有binlog记录同步到relay日志,从库对于指定replicate-do-db库的DML语句都会执行。对于非指定replicate-do-db库的DML语句都不执行。
这个是对从库起作用的参数,在从库中配置:
replicate-ignore-db=a;
(1)在a库中对b库的表进行DDL
主库: mysql> use a; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> create table b.b7 (id int); Query OK, 0 rows affected (0.01 sec) mysql> alter table b.b add column (age int); Query OK, 0 rows affected (0.05 sec) Records: 0 Duplicates: 0 Warnings: 0 从库: mysql> use b; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> show tables; +-------------+ | Tables_in_b | +-------------+ | b | | b1 | | b2 | | b3 | | b6 | +-------------+ 5 rows in set (0.00 sec) mysql> desc b; +-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | | name | varchar(10) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+
结论:从库会将主库的所有binlog记录同步到relay日志,对于在replicate-ignore-db库执行的的DDL语句都不会执行。
(2)在b库中对a库的表进行DDL
主库: mysql> use b; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> create table a.a7 (id int); Query OK, 0 rows affected (0.02 sec) mysql> alter table a.a add column (age int); Query OK, 0 rows affected (0.05 sec) Records: 0 Duplicates: 0 Warnings: 0 从库: mysql> use a; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> desc a; +-------+---------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+---------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | | age | int(11) | YES | | NULL | | +-------+---------+------+-----+---------+-------+ 2 rows in set (0.00 sec) mysql> show tables; +-------------+ | Tables_in_a | +-------------+ | a | | a1 | | a2 | | a4 | | a7 | +-------------+ 5 rows in set (0.00 sec) mysql>
结论:从库会将主库的所有binlog记录同步到relay日志,对于非replicate-ignore-db库执行的的DDL语句都会执行。
(1)在a库中对b库的表进行DML
主库: mysql> use a; Database changed mysql> insert into b.b (id) values(21); Query OK, 1 row affected (0.00 sec)
从库: mysql> select * from b.b; +------+------+ | id | name | +------+------+ | 1 | b | | 2 | b1 | | 21 | NULL | +------+------+ 3 rows in set (0.00 sec)
结论:从库会将主库的所有binlog记录同步到relay日志,对于在replicate-ignore-db库中执行的非replicate-ignore-db指定库表的DML语句都会执行。
(2)在b库中对a库的表进行DML
主库: mysql> use b; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> insert into a.a (id) values(22); Query OK, 1 row affected (0.01 sec)
从库: mysql> select * from a.a; +------+------+ | id | age | +------+------+ | 1 | NULL | | 2 | NULL | | 3 | NULL | | 1 | NULL | | 4 | NULL | | 100 | NULL | | 400 | NULL | | 600 | NULL | +------+------+ 8 rows in set (0.00 sec)
结论:从库会将主库的所有binlog记录同步到relay日志,对于在非replicate-ignore-db库执行的非replicate-ignore-db库的表的DML语句都会执行,replicate-ignore-db库的表的DML都不会执行。
请尽量不要在生产环境中使用以上参数!请尽量不要在生产环境中使用以上参数!请尽量不要在生产环境中使用以上参数!
MySQL 5.7选择性同步--几个不推荐在生产环境用的参数
标签:varchar exe for man value warnings rop 说明 选择
原文地址:https://www.cnblogs.com/doctormo/p/12358365.html