Which features can improve system performance in SAN storage?

In Huawei OceanStor Hybrid Flash systems, performance optimization is achieved through intelligent resource management. Level-2 cache (Option A), known as SmartCache, utilizes SSDs as an extension of the system’s DRAM cache. By storing "hot" data on high-speed SSDs, the system significantly reduces the read latency for frequently accessed blocks that have been evicted from the primary memory cache.

Storage tiering (Option D), orSmartTier, automatically migrates data blocks between different storage tiers (SSD, SAS, and NL-SAS) based on their access frequency. It ensures that active data resides on the highest-performance media while moving inactive "cold" data to high-capacity drives. These two features are specifically designed to maximize IOPS and minimize response times. In contrast,Thin Provisioning (SmartThin)andData Deduplication (SmartDedupe)are "Storage Efficiency" features; their primary goal is to save physical space and improve capacity utilization. While essential for TCO, they do not inherently improve raw system performance and may involve a minor metadata overhead during processing.