KV/Redis

Redis KV is the industry standard for sub-millisecond data retrieval using a simple key-value store architecture.

Engineers choose Redis for its speed (benchmarked at over 1 million requests per second) and its versatility as an in-memory data structure store. It functions as a high-performance cache or a primary database for session management and real-time analytics. By keeping data in RAM and offering optional persistence (RDB or AOF), Redis eliminates disk I/O bottlenecks. It supports complex operations beyond simple GET and SET commands, including atomic increments and expiration TTLs, making it the go-to choice for scaling modern distributed systems.

https://redis.io/docs/latest/develop/data-types/kv/