MySQL Proxy: Load Balancing & High Availability Guide

MySQL Proxy is a tool that allows for intermediary proxy between MySQL server and client, with the primary purpose being:

1. Load balancing: MySQL Proxy can distribute client requests to multiple MySQL servers, achieving load balancing to enhance the overall performance and scalability of the system.
2. High availability: By using MySQL Proxy, real-time monitoring and detection can be performed between backend MySQL servers. In the event of a server failure or outage, requests will automatically be redirected to other available servers, achieving high availability.
3. Query analysis and optimization: MySQL Proxy can intercept and analyze client query requests, as well as perform performance optimizations. It can cache query results, combine small query requests, rewrite query statements, etc., to improve query efficiency and performance.
4. Query filtering and authorization: MySQL Proxy can intercept and filter client query requests, allowing for query filtering and authorization based on custom rules. This can enhance database security and restrict query permissions for certain users.

In conclusion, the role of MySQL Proxy is to provide a configurable and scalable intermediary layer to manage and control communication between MySQL servers and clients, aiming to enhance the system’s performance, availability, and security.