Didi Tech

Feb 18, 2020 · Backend Development

Didi Ride‑Sharing Dispatch Engine: Architecture, Challenges, and Stability Measures for Carpool Day

During Didi’s 2019 Carpool Day promotion, a surge of up to 6.6‑times normal matching traffic forced a redesign of its dispatch engine, introducing near‑time assignment, filtered logic moves, configurable timeouts, extensive stress testing, monitoring, and rapid on‑call procedures that cut downstream pressure by over half.