Valkey 9.1.3 migration breaks Redis 8.10 streams replication

Valkey and Redis are functionally identical for basic caches and job queues in 2026, offering similar performance and protocol compatibility, but differ significantly in licensing and advanced feature integration. The author notes that while Valkey provides a BSD license under the Linux Foundation, upgrading from newer Redis versions presents major migration hurdles, notably with streams and module-specific data types that break RDB loading and replication. Open article →