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Data backup and failure recovery: Discussion on the importance of MySQL master-slave replication in cluster mode
Introduction: In recent years, with the continuous increase in data scale and complexity With growth, database backup and failure recovery become even more important. In distributed systems, MySQL master-slave replication is widely used in cluster mode to provide high availability and fault tolerance. This article will explore the importance of MySQL master-slave replication in cluster mode and give some code examples.
1. The basic principles and advantages of MySQL master-slave replication
MySQL master-slave replication is a method of recording the modification operations of the master database into the binary log (binlog) and transmitting them through the network. These logs are transferred to the database to achieve data replication. The basic principle of master-slave replication is as follows:
MySQL master-slave replication has the following advantages in cluster mode:
2. MySQL master-slave replication steps and sample code
MySQL master-slave replication mainly includes the following steps:
# 在my.cnf文件中开启二进制日志记录 log-bin=mysql-bin # 配置唯一标识符 server-id=1 # 配置需要复制的数据库 binlog-do-db=database1
# 配置唯一标识符 server-id=2 # 配置需要连接的主服务器 master-host=master_server_ip # 配置复制的用户名和密码 master-user=replication_user master-password=password # 配置需要复制的数据库 replicate-do-db=database1
# 启动主服务器 $ /etc/init.d/mysql start # 启动从服务器 $ /etc/init.d/mysql start
Create a new record on the master server:
mysql> USE database1; mysql> INSERT INTO table1 (column1, column2) VALUES ('value1', 'value2');
On the slave server Check whether the synchronization is successful:
mysql> USE database1; mysql> SELECT * FROM table1;
The above are the basic configuration steps and sample code for MySQL master-slave replication. By configuring the master server and slave server, enabling binlog logging, and setting the database to be replicated, database backup and fault recovery can be achieved.
3. Summary
MySQL master-slave replication has important significance and advantages in cluster mode. It can provide high availability and fault tolerance, share read pressure, and support distributed queries. By understanding the basic principles and configuration steps of MySQL master-slave replication, we can better cope with the challenges of database backup and failure recovery. In practice, we can also ensure the stability and reliability of master-slave replication by using monitoring tools and regularly checking logs. I hope this article will be helpful to readers in the use and maintenance of MySQL master-slave replication.
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