BUILDING A NEXT-GENERATION KEY-VALUE STORE AT AIRBNB

Summary from the TLDR Web Dev newsletter

Airbnb completely re-architected its key-value store, Mussel, replacing the original version with a new NewSQL backend (v2) to meet demands like real-time checks and massive data. Mussel v2 addresses v1's limitations with better scalability, predictable performance, reduced operational complexity, and more flexible consistency options. The migration process involved a blue/green deployment strategy with shadowing, reverse traffic patterns, and a custom pipeline to guarantee zero data loss.