Scaling a Ride‑Hailing Order System: From Single SQLServer to Sharded MySQL
This article recounts the step‑by‑step evolution of a ride‑hailing order service’s data layer—from a single SQLServer database through SQL optimization, read‑write splitting, business‑domain sharding, caching and MQ integration, to a custom sharding component and smooth migration to MySQL—highlighting challenges, solutions, and lessons learned.
