Amap Tech

Mar 5, 2021 · Databases

Scaling and Migrating a High‑Volume Order System with Sharding, Data Synchronization and Gray‑Rollout on Alibaba Cloud

To support Gaode Taxi’s soaring order volume, the team expanded from four to eight ECS instances, re‑sharded 256 tables into 4,096, built a custom binlog‑to‑Kafka sync middleware for full‑load and incremental migration, implemented rigorous validation and repair processes, and employed a gray‑rollout with ABC verification, completing the migration without code changes or incidents.