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Lossy Service

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Tencent Cloud Developer
Tencent Cloud Developer
Apr 24, 2020 · Backend Development

Mask Reservation Mini‑Program: From Perfect Experience to Lossy Service – Architecture and Design

During the COVID‑19 pandemic, Tencent and Guangzhou built the “Suikang” mask‑reservation mini‑program in two days, handling 1.7 billion visits by shifting from real‑time inventory checks to a four‑layer “lossy” architecture—CDN caching, batch releases, Redis, Kafka queues, and asynchronous processing—to trade consistency for high availability and rapid response.

CAP theoremKafkaLossy Service
0 likes · 23 min read
Mask Reservation Mini‑Program: From Perfect Experience to Lossy Service – Architecture and Design
Art of Distributed System Architecture Design
Art of Distributed System Architecture Design
Feb 27, 2015 · Backend Development

How WeChat Processed Over 1 Billion Red Packets: Backend Architecture and High‑Concurrency Strategies

The article explains how WeChat’s backend handled the massive surge of red‑packet traffic during the 2015 New Year by employing loss‑tolerant services, flexible availability, modular design, asynchronous processing, and overload protection to ensure fast, accurate, and stable user experiences.

Lossy ServiceRed PacketWeChat
0 likes · 9 min read
How WeChat Processed Over 1 Billion Red Packets: Backend Architecture and High‑Concurrency Strategies