LRU-K

HelloTech

Dec 15, 2022 · Backend Development

Optimization of Reverse Geocoding Service: Caching, GeoHash, and LRU Strategies

By eliminating unnecessary reverse‑geocode calls, aggregating nearby coordinates with GeoHash, and employing a multi‑layer LRU‑K cache with time‑ and access‑count eviction, the Hellobike map team cut daily requests from 200‑300 million to 20‑30 million while adding fallback and monitoring mechanisms.