replicate-rewrite-db和Replicate_Wild_Do_Table實現表級別對映覆制

將3306 例項下sakila 的兩張表actor 同步到5725 例項下的ming 資料庫中。

 

初始化資料

mysqldump -uroot -poracle -q --single-transaction -n -B sakila --tables actor --master-data=2 > sakila.sql

注意新增-n ，不生成建立database 的語句。

mysql> create database ming;

Query OK, 1 row affected (0.00 sec)

 

mysql> use ming

Database changed

mysql> source /root/sakila.sql

 

修改從庫引數檔案，並重啟從庫

新增：

replicate-rewrite-db = sakila -> ming

 

CHANGE MASTER TO

MASTER_HOST='192.168.61.2',

MASTER_USER='repl',

MASTER_PASSWORD='oracle',

MASTER_LOG_FILE='mysql-bin.000013',

MASTER_LOG_POS=154;

 

如果只新增replicate-rewrite-db 這個引數，只是實現了資料庫級別的複製，還不是表級別。這樣會很容易複製其他操作到從庫，導致sql thread 報錯。

比如主庫執行

mysql> use sakila

mysql> 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

 

有關actor_bak 的動作會被傳遞到從庫。但是從庫沒有tt 資料庫，那麼就會sql thread 程式就會報錯。

Last_SQL_Error: Error 'Unknown database 'tt'' on query. Default database: 'ming'. Query: 'create table tt.t1 like actor_bak'

所以完整的寫法應該是；

replicate-rewrite-db = sakila -> ming

replicate-wild-do-table=ming.actor

 

主庫執行

mysql> use sakila

mysql> insert into  tt.t1 select * from actor_bak;                

Query OK, 200 rows affected (0.00 sec)

Records: 200  Duplicates: 0  Warnings: 0

從庫不會再報錯。

新增如上引數後，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: 0 Master_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)

 

線上修改引數前，需要先暫停SQL thread 程式：

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 引數

CHANGE REPLICATION FILTER     REPLICATE_DO_DB = ( ) , REPLICATE_IGNORE_DB = ( ) ;

其它寫法：

CHANGE REPLICATION FILTER

REPLICATE_WILD_IGNORE_TABLE = ('db1.new%', 'db2.new%');

如果相同的過濾規則出現了多次，那麼只有最後一個規則會生效：

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 );

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