replicate-rewrite-db和Replicate_Wild_Do_Table如何实现表级别映射复制
这期内容当中小编将会给大家带来有关replicate-rewrite-db和Replicate_Wild_Do_Table如何实现表级别映射复制,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
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 ming
Database changed
mysql> 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 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 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 sakila
mysql> 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: 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)
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
CHANGEREPLICATIONFILTER 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);
上述就是小编为大家分享的replicate-rewrite-db和Replicate_Wild_Do_Table如何实现表级别映射复制了,如果刚好有类似的疑惑,不妨参照上述分析进行理解。如果想知道更多相关知识,欢迎关注亿速云行业资讯频道。
声明:本站所有文章资源内容,如无特殊说明或标注,均为采集网络资源。如若本站内容侵犯了原著者的合法权益,可联系本站删除。