How Roblox’s Cache Sustained 1.38B QPS Beyond Redis Limits

This post details how Roblox architected a federated caching service to sustain 1.38 billion QPS, exceeding traditional Redis node limits. It addresses the challenge of high-velocity, ephemeral data retrieval in a massive-scale multiplayer gaming environment, where 200ms delays can disrupt gameplay. The system acts as a shock absorber, handling peak loads and navigating a 10x traffic surge on its largest cluster.