MYSQL主从复制搭建全过程实战---探索不能实时同步的关键性参数 - 数据库编程

一、主库操作?

1、全库导出
mysqldump -h192.168.1.6 --all-databases -uroot -proot --opt --add-drop-database --add-drop-table --events --triggers --routines --default-character-set=utf8 --master-data=2 --single-transaction --complete-insert --quote-names --log-error=/gyj/mysqldump20150520.log > /gyj/backup_20150520.mysql

2、获得导出时候的mysql的binlog的位置
（head -50 backup_20150520.mysql或者tail -50 backup_20150520.mysql）

----CHANGE MASTER TO MASTER_LOG_FILE='binlog.000001', MASTER_LOG_POS=529372;

3、拷贝主库备份到从备
[root@uubee6 gyj]# scp backup_20150520.mysql root@192.168.1.8:/gyj/

二、备库操作
1、清空备库数据库（保留information_schema、performance_schema、 mysql三个库），然后导入主库的数据
确认慢日志有没有关闭：SET GLOBAL slow_query_log=off;
如果没关闭导入时会报错：ERROR 1580 (HY000) at line 3405: You cannot 'DROP' a log table if logging is enabled

mysql -h192.168.1.8 -uroot -proot < /gyj/backup_20150520.mysql

三、主库操作
1、建复制用户
GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%' IDENTIFIED BY 'slavepass';

四、备库操作

1、在从库配置连接主库，执行以下命令

CHANGE MASTER TO
MASTER_HOST='192.168.1.6',
MASTER_USER='repl',
MASTER_PASSWORD='slavepass',
MASTER_PORT=3306,
MASTER_LOG_FILE='binlog.000001',
MASTER_LOG_POS=529372,
MASTER_CONNECT_RETRY=10;

2、启动从库
mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

3、查询slave状态：

mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.6
Master_User: repl
Master_Port: 3306
Connect_Retry: 10
Master_Log_File: binlog.000001
Read_Master_Log_Pos: 657284
Relay_Log_File: relaylog.000002
Relay_Log_Pos: 128192
Relay_Master_Log_File: binlog.000001
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: 657284
Relay_Log_Space: 128358
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: 101
Master_UUID: c811e75a-d875-11e4-8bb1-b083fede6c94
Master_Info_File: /u01/my3306/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
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
1 row in set (0.00 sec)


ERROR:
No query specified

五、测试
1、主库操作

mysql> select * from t1;
+------+
| id |
+------+
| 1 |
+------+
1 row in set (0.00 sec)


mysql> insert into t1 values(2);
Query OK, 1 row affected (0.00 sec)


mysql> commit;
Query OK, 0 rows affected (0.00 sec)


mysql> select * from t1;
+------+
| id |
+------+
| 1 |
| 2 |
+------+
2 rows in set (0.00 sec)

2、备库操作

mysql> select * from t1;
+------+
| id |
+------+
| 1 |
+------+

MYSQL主从复制搭建全过程实战---探索不能实时同步的关键性参数(一)