dbaplus Community

Aug 13, 2026 · Databases

Why Redis Cluster Limits You to DB 0 (and How to Work Around It)

Redis Cluster enforces a single database (DB 0) because its slot‑based sharding model relies on a global 16,384‑slot map, and supporting multiple databases would break slot consistency, migration, and scalability, so developers must use key prefixes, separate instances, or multiple clusters to achieve logical isolation.