Redis, as a fast caching tool, has limitations in terms of data persistence and durability. While it can be used for temporary storage, its core design doesn't support true database functionality. Redis offers two approaches to persistence: Regular Snapshot (RDB) and Append Only File (AOF). RDB is similar to a standard backup process but can lead to significant latency due to the need for frequent snapshots. AOF logs every data-altering command sent to the instance, providing better durability but also increasing resource usage and potential issues with storage bloat and slow recovery times. Redis Enterprise users have limited options compared to community versions, including RDB and AOF on different schedules. Ultimately, choosing the right persistence approach depends on specific needs and architectures, as each has its pros and cons. For those seeking hyperfast speeds and comprehensive data persistence, alternatives like Aerospike offer a Hybrid Memory Architecture (HMA) that splits data between DRAM for speed and NVME flash for persistence, providing built-in durability and resilience without the need for split-cache architectures.