实现双向复制的方法
第一步: 在从机创建主机用户
打开从机的mysql命令行 (192.168.1.29)
mysql> GRANT REPLICATION SLAVE ON . TO 'master_replicator'@'%' IDENTIFIED BY 'master';
现在我们用这个命令‘show master status’来确定当前二进制日志文件的文件名和位置。记住这个细节！在我们的事例中得到以下输出：
show master status; +------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql-bin.000153 | 106 | | | +------------------+----------+--------------+------------------+ 1 row in set (0.00 sec)继续:mysql> FLUSH PRIVILEGES;
选择数据库 :mysql> USE newdatabase;
锁数据库防止任何新的更改:FLUSH TABLES WITH READ LOCK;
Step 2: 用主机用户连接从机(192.168.1.30):
在主机上打开mysql命令行
停止从机 : Stop slave;
执行命令
mysql> CHANGE MASTER TO -> MASTER_HOST='192.168.1.29', -> MASTER_USER='master_replicator', -> MASTER_PASSWORD='master', -> MASTER_LOG_FILE='mysql-bin.000153', -> MASTER_LOG_POS=106; 重启从机开始复制 : Start Slave;下面命令检查系统状态 :
SHOW SLAVE STATUS\G;你可以看到 192.168.1.30:
mysql> SHOW SLAVE STATUS\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.1.29 Master_User: slave_user Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000013 Read_Master_Log_Pos: 98 Relay_Log_File: PC-relay-bin.000074 Relay_Log_Pos: 235 Relay_Master_Log_File: mysql-bin.000013 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: demo 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: 98 Relay_Log_Space: 235 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 1 row in set (0.01 sec) ERROR: No query specified