mysql 主从的实验测试

一主一从

一.  异步的主从复制需要注意的事项：

1. 主和从的myql要能正常的运行如：

[root@localhost data]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.5.33-log MySQL Community Server (GPL)
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| dbtest             |
| mysql              |
| nihao              |
| performance_schema |
| test               |
+--------------------+
6 rows in set (0.00 sec)
mysql>

2. 主从的配置文件my.cnf

    server-id 是唯一标示符  主和从的不同相同

    主要启用二进制日志，从要启用中继日志

    主的要创建一个授权用户，可以复制。从要连接主的用CHANGE MASTER TO

     最重要的一点就是一下两个选项一定要是yes  否者是有故障。如下图

             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: 192.168.1.148
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 107
Relay_Log_File: localhost-relay-bin.000003
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes   #一定要是yes
Slave_SQL_Running: Yes   #一定要是yes  从要启用start slave；
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: 107
Relay_Log_Space: 413
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: 1
1 row in set (0.00 sec)

本文出自 “郑彦生” 博客，谢绝转载！

mysql 主从的实验测试,古老的榕树,5-wow.com