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创建MySQL从库

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2016-06-07 16:22:281059browse

我们知道Oracle有DataGuard实时备份数据,可以做主备切换,而MySQL也有自己的一套备库方案,称之为主从复制。 搭建MySQL从库是为了实时同步主库数据,同时也可以分担主库的读压力,对数据库端做成读写分离结构。 搭建MySQL主从库注意点: 1.主库和从库的 ser

   我们知道Oracle有DataGuard实时备份数据,,可以做主备切换,而MySQL也有自己的一套备库方案,称之为主从复制。

  搭建MySQL从库是为了实时同步主库数据,同时也可以分担主库的读压力,对数据库端做成读写分离结构。

  搭建MySQL主从库注意点:

  1.主库和从库的 server-id 一定不能相同。

  2.在主库创建replication slave账户。

  grant replication slave on *.* to 'repl'@'192.168.0.232' identified 'oracle';

  3.查看主库master状态

  mysql> show master status /G

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

  File: mysql-bin.000005

  Position: 251651

  Binlog_Do_DB:

  Binlog_Ignore_DB:

  1 row in set (0.00 sec)

  4.配置从库

  change master to

  -> master_host='192.168.0.232',

  -> master_user='repl',

  -> master_password='oracle',

  -> master_log_file='mysql-bin.000005',

  -> master_log_pos=251651;

  5. 启动从库

  slave start

  show slave status/G

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

  Slave_IO_State: Waiting for master to send event

  Master_Host: ***********

  Master_User: repl

  Master_Port: 3306

  Connect_Retry: 60

  Master_Log_File: mysql-bin.000005

  Read_Master_Log_Pos: 463725968

  Relay_Log_File: mysql-relay-bin.000006

  Relay_Log_Pos: 463726114

  Relay_Master_Log_File: mysql-bin.000005

  Slave_IO_Running: Yes

  Slave_SQL_Running: Yes

  Replicate_Do_DB: ******************

  Replicate_Ignore_DB:

  Replicate_Do_Table:

  Replicate_Ignore_Table:

  Replicate_Wild_Do_Table:

  Replicate_Wild_Ignore_Table:

  Last_Errno: 0

  Last_Error:

  Skip_Counter: 0

  Exec_Master_Log_Pos: 463725968

  Relay_Log_Space: 873569451

  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: 100

  注意:

  如果从库Slave_IO_Running: No/ Slave_SQL_Running: No

  关闭slave

  设置set GLOBALSQL_SLAVE_SKIP_COUNTER=1;

  在开启slave

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