Uber RAMEN Architecture: Real-Time Push Messaging
Prerequisite: Familiarity with the concepts introduced in Part 5 — Pricing Surge Engine. Review our stateful edge architectures in Cloudflare D1 & Durable Objects Realtime Cart to understand persistent socket routing. Answer-first: Scaling real-time dispatch pushes requires a stateful push gateway layer maintaining millions of persistent gRPC and WebSocket connections. Terminating mTLS at high-performance Envoy proxies and indexing active socket locations in a distributed Redis registry allows backend dispatchers to deliver targeted ride offers in under 100 milliseconds across volatile mobile cellular networks. ...