Sorry if the post sounds too marketing-heavy. I'm sharing this case study because it addresses a common technical challenge: scaling a high-traffic application (Kwai, a video platform) from traditional MySQL to a distributed database system. It describes the journey from managing 300+ MySQL shards to consolidating into a single 400TB cluster using OceanBase, handling over 1 million QPS during peak loads. While the post is oriented towards promoting OceanBase, it resonated with developers because it provides specific technical details about real-world scaling problems, architecture decisions, and performance metrics that many engineering teams face when growing beyond traditional MySQL setups.