WeChat Backend Team

Jan 17, 2019 · Operations

How We Built DAGOR: A Scalable Overload Control System for Massive Microservices

This article presents DAGOR, a decentralized overload control framework designed for large‑scale microservice architectures like WeChat’s backend, detailing its service‑agnostic design, priority‑based admission policies, adaptive algorithms, and experimental evaluation that demonstrates improved success rates, fairness, and robustness under heavy load.