Design and Implementation of a Capacity-Variant Storage System for SSDs

Explore the innovative design and implementation of a capacity-variant storage system (CVSS) for flash-based solid-state drives (SSDs) in this conference talk from FAST '24. Discover how CVSS maintains high performance throughout an SSD's lifetime by allowing storage capacity to gracefully reduce over time, preventing fail-slow symptoms. Learn about the three key components of CVSS: CV-SSD, CV-FS, and CV-manager. Examine the effectiveness of CVSS through synthetic and real workload demonstrations, showcasing significant improvements in latency, throughput, and lifetime compared to fixed-capacity storage systems. Gain insights into how CVSS can reduce latency by 8-53%, improve throughput by 49-316%, and extend SSD lifetime by 268-327% under real workloads.