MySQL's transaction logs are the backbone of data integrity and recovery. The Undo Log supports rollback and MVCC, the Redo Log ensures durability after crashes, and the Binlog enables replication and point-in-time recovery. This article explains how these logs interact during transactions, commits, and failures. For backend engineers and DBAs, mastering this triad is essential for tuning performance, diagnosing deadlocks, and planning backup strategies. The content is evergreen and applies to MySQL 5.7 through 8.x, making it a valuable reference for production systems.
A deep dive into MySQL's three core logs—Undo, Redo, and Binlog—and their role in transaction integrity and replication.