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This article discusses iQIYI’s approach to database selection, covering evaluation criteria, the variety of databases used—including MySQL, TiDB, Redis, Couchbase, and the in‑house HiKV—along with detailed optimization, high‑availability, auditing, and operational management techniques for each system.
The article outlines practical database selection criteria—cost, stability, performance, scalability, security—and details iQIYI’s concrete implementations of MySQL, Redis, Couchbase, and the custom HiKV store, describing their architectures, backup and scaling mechanisms, operational tooling evolution, and a decision‑tree guide for matching workloads to the appropriate database technology.
The article details iQIYI’s Bubble social service cache architecture, comparing Couchbase and Redis, explaining vBucket design and management UI, and presenting three real‑world optimizations—like‑system key redesign, voting‑system aggregation, and SDK upgrade—along with migration, synchronization, and operational best‑practice recommendations.