将3306 实例下sakila 的两张表actor 同步到5725 实例下的ming 数据库中。 初始化数据mysqldump -uroot -poracle -q --single-transaction -n -B sakila --tables actor --master-data=2 > sakila.sql 注意添加-n ，不生成创建database 的语句。mysql> create database ming;Query OK, 1 row affected (0.00 sec) mysql> use mingDatabase changedmysql> source /root/sakila.sql 修改从库参数文件，并重启从库 添加：replicate-rewrite-db = sakila -> ming CHANGE MASTER TOMASTER_HOST='192.168.61.2',MASTER_USER='repl',MASTER_PASSWORD='oracle',MASTER_LOG_FILE='mysql-bin.000013',MASTER_LOG_POS=154; 如果只添加replicate-rewrite-db 这个参数，只是实现了数据库级别的复制，还不是表级别。这样会很容易复制其他操作到从库，导致sql thread 报错。 比如主库执行mysql> use sakilamysql> create table actor_bak like actor;Query OK, 0 rows affected (0.31 sec) mysql> insert into actor_bak select * from actor;Query OK, 200 rows affected (0.17 sec)Records: 200 Duplicates: 0 Warnings: 0 mysql> update tt.test01 set c2=10 where c1=9;Query OK, 1 row affected (0.12 sec)Rows matched: 1 Changed: 1 Warnings: 0 有关actor_bak 的动作会被传递到从库。但是从库没有tt 数据库，那么就会sql thread 进程就会报错。 Last_SQL_Error: Error 'Unknown database 'tt'' on query. Default database: 'ming'. Query: 'create table tt.t1 like actor_bak' 所以完整的写法应该是； replicate-rewrite-db = sakila -> ming replicate-wild-do-table=ming.actor 主库执行mysql> use sakilamysql> insert into tt.t1 select * from actor_bak; Query OK, 200 rows affected (0.00 sec)Records: 200 Duplicates: 0 Warnings: 0 从库不会再报错。 添加如上参数后，可以在show slave status 中看到。
|
mysql [localhost] {msandbox} ((none)) > show slave status\G*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.61.2 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000013 Read_Master_Log_Pos: 9815 Relay_Log_File: relay-bin.000004 Relay_Log_Pos: 4683 Relay_Master_Log_File: mysql-bin.000013 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: ming.actor Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 9815 Relay_Log_Space: 4884 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1051295 Master_UUID: 4c312339-ab38-11e9-86a8-000c29050245 Master_Info_File: /root/sandboxes/msb_5_7_25/data/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0 Replicate_Rewrite_DB: (sakila,ming) Channel_Name: Master_TLS_Version:1 row in set (0.00 sec) |
在线修改参数前，需要先暂停SQL thread 进程：mysql [localhost] {msandbox} ((none)) > stop slave sql_thread;Query OK, 0 rows affected (0.00 sec)mysql [localhost] {msandbox} ((none)) > change replication filter replicate_rewrite_db=((sakila,ming));Query OK, 0 rows affected (0.00 sec)mysql [localhost] {msandbox} ((none)) > start slave sql_thread;Query OK, 0 rows affected (0.00 sec) Remove 参数 CHANGE REPLICATION FILTER REPLICATE_DO_DB = ( ) , REPLICATE_IGNORE_DB = ( ) ; 其它写法： CHANGE REPLICATION FILTER REPLICATE_WILD_IGNORE_TABLE = ('db1.new%', 'db2.new%'); 如果相同的过滤规则出现了多次，那么只有最后一个规则会生效： CHANGE REPLICATION FILTER
REPLICATE_DO_DB = ( db1 , db2 ) , REPLICATE_DO_DB = ( db3 , db4 ) ;
CHANGE REPLICATION FILTER REPLICATE_DO_DB = ( db3 , db4 ) ; CHANGE REPLICATION FILTER REPLICATE_DO_DB = ( d1 ), REPLICATE_IGNORE_DB = ( d2 );
