Redis Enterprise cluster achieved sub-millisecond latency for durable 'write' operations, but not for single durable operation under sub-millisecond latency on state-of-the-art cloud storage infrastructure like AWS io1 EBS. Despite the performance limitations of Redis in an ACID configuration, it can still achieve over 650K ACID ops/sec with high-end persistent storage devices like Dell-EMC VMAX. The use of a Dynamic Virtual Matrix interface and FlashBoost technology enables VMAX to scale from one engine to eight and deliver sub-millisecond latency for reads and writes. A single Redise cluster node can support over 650K ACID operations per second while maintaining sub-millisecond database latency with high-end persistent storage devices like Dell-EMC VMAX, which far surpasses the performance of state-of-the-art cloud storage infrastructure.