Jul 14, 2026 · Backend Development

Building a Billion‑Message, Millisecond‑Scale Private Messaging System with Spring Boot, RabbitMQ & Redis

This article presents a production‑grade design for a social private‑messaging system that handles billions of messages with millisecond latency, detailing how MySQL serves as the message fact store, RabbitMQ provides low‑latency distribution, Redis manages online state and indexes, and Outbox plus idempotent consumption ensure reliability and ordering.

idempotencyoutboxprivate-messaging

0 likes · 35 min read

Building a Billion‑Message, Millisecond‑Scale Private Messaging System with Spring Boot, RabbitMQ & Redis

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Dec 9, 2025 · Backend Development

How Bilibili Scaled Its Private Messaging System to Handle 10× Traffic

This article analyzes Bilibili's private messaging architecture, identifies performance bottlenecks such as MySQL slow queries, storage limits, and tightly coupled services, and presents a multi‑layer redesign with caching, sharding, BFF separation, and consistency mechanisms to sustain tenfold traffic growth.

Bilibilibackend architecturecaching

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How Bilibili Scaled Its Private Messaging System to Handle 10× Traffic