Distributed transactions remain a challenge in microservices architectures. Seata AT mode offers a practical solution using a two-phase commit protocol with automatic compensation. This article examines the inner workings of Seata AT, focusing on how it prevents dirty writes through global locks and undo logs. It covers failure scenarios like network partitions and node crashes, and explains the design choices that ensure data consistency without sacrificing performance. For teams already using or evaluating Seata, this analysis provides actionable insights into production hardening. The content is evergreen and commercially valuable for backend engineers and architects dealing with cross-service data integrity.
A deep dive into Seata AT's two-phase commit and dirty write defense mechanisms for distributed transactions.