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mysql主从复制

时间:2021-07-01 10:21:17 帮助过:23人阅读


mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 |      476 |              |                  |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

4:在从服务器上修改自己的master的数据库

    登入数据库

[root@slave ~]# mysqladmin -uroot password 123123
[root@slave ~]# mysql -uroot -p123123

    设置从服务器读取master bin-log的相关信息

mysql> change master to 
    -> master_host=‘192.168.100.150‘,    ##master的ip
    -> master_user=‘slave‘,              ##授权允许复制的用户名
    -> master_password=‘123123‘,         ##授权允许复制密码
    -> master_log_file=‘mysql-bin.000003‘,   ##bin-log文件名,上一步在master上查到的信息
    -> master_log_pos=476;     ##偏移量,在master上查到的信息
Query OK, 0 rows affected (0.07 sec)

    启动slave

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

    插卡slave状态:    

        

            ##查到的状态这两个为yes,下面没有error错误就正常
            Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

    

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.100.150
                  Master_User: slave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 706
               Relay_Log_File: mysqld-relay-bin.000002
                Relay_Log_Pos: 481
        Relay_Master_Log_File: mysql-bin.000003
             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: 706
              Relay_Log_Space: 637
              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: 
1 row in set (0.00 sec)
ERROR: 
No query specified
mysql>


5:测试:

    

    在主数据库上新建库,查看库

mysql> 
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+
3 rows in set (0.00 sec)
mysql> create database test_databases;
Query OK, 1 row affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
| test_databases     |
+--------------------+
4 rows in set (0.00 sec)

    在从数据库上查看库:

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
| test_databases     |
+--------------------+
4 rows in set (0.00 sec)

   (可以看到在主数据库上新建的库,复制过来了)


删除操作也是可以同步的:

    主:

mysql> drop database test_databases;
Query OK, 0 rows affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+
3 rows in set (0.00 sec)
mysql>

    从:

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+
3 rows in set (0.00 sec)
mysql>

    

本文出自 “向往技术的小白” 博客,请务必保留此出处http://lesliecheung.blog.51cto.com/12622169/1958255

mysql主从复制

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