Why is mysql master-slave separated?

The reasons for mysql master-slave separation: 1. To improve system performance, read operations can be distributed to multiple slave servers, thereby increasing the concurrency capability of the database; 2. To increase data security, when the master server fails Or when data loss occurs, the slave server can be used as a redundant backup to restore data in a timely manner; 3. Realize data backup and recovery, and the data in the master server can be restored at any time to ensure data security.

The operating system of this tutorial: Windows 10 system, mysql version 8.0, Dell G3 computer.

MySQL master-slave separation is a commonly used database architecture design pattern. It separates data writing and reading by dividing the database server into a master server (Master) and a slave server (Slave). This article discusses several important reasons for MySQL master-slave separation, including improving system performance, increasing data security, and realizing data backup and recovery.

1. Improve system performance

MySQL master-slave separation can significantly improve system performance. The master server is responsible for processing the user's write requests, while the slave server is responsible for processing the user's read requests. By spreading read requests across multiple slave servers, the burden on the master server can be greatly reduced, allowing it to better handle concurrent read requests. In this way, the performance of the entire system will be improved, and users will be able to get better response times when accessing websites or applications.

In addition, MySQL master-slave separation can also effectively share the network transmission pressure of the database. Since the master server is only responsible for write operations, and the slave server is only responsible for read operations, you can deploy the master server and slave servers on different physical machines or virtual machines, and use multiple network cards to transmit data in parallel, thereby improving the entire system. network transmission performance.

2. Increase data security

MySQL master-slave separation can also improve data security. When the master server fails or data is lost, the slave server can be used as a redundant backup to restore data in a timely manner. By configuring an appropriate synchronization mechanism, when the master server fails or data is lost, the slave server can serve as a redundant backup and restore data in a timely manner.

In addition, MySQL master-slave separation can also provide multiple protections for data. By configuring the slave server to read-only mode, you can avoid data damage or loss caused by misoperation or malicious attacks. Even if some catastrophic failures occur on the master server, the data on the slave server is still intact, ensuring system availability.

3. Realize data backup and recovery

MySQL master-slave separation can also realize real-time backup and recovery of the database. In the main server, you can configure regular data backup tasks to back up data to other storage media to prevent data loss or accidental deletion. The data in the slave server can be used as a real-time backup, and the data in the master server can be restored at any time to ensure data security.

In addition, since the data on the slave server is synchronized in real time, you can easily switch the master-slave role for smooth database upgrade or system maintenance. When the master server needs to be upgraded or maintained, it can be switched to the role of the slave server, and the slave server is switched to the role of the master server, thereby achieving zero-downtime upgrade or maintenance.

Conclusion:

As a commonly used database architecture design pattern, MySQL master-slave separation plays an important role in improving system performance, increasing data security, and realizing data backup and recovery. By properly configuring the master and slave servers, you can simultaneously improve system performance, increase data security, and achieve real-time backup and recovery of data. Therefore, when designing and building a database system, it is very necessary and beneficial to reasonably consider and apply master-slave separation.

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