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This conference talk from USENIX FAST '25 presents PolyStore, a horizontally structured storage architecture designed to overcome limitations of traditional hierarchical storage systems. Learn how researchers from Rutgers University, EPFL, and Samsung Semiconductor developed a meta layer that spans userspace and operating system, enabling applications to concurrently access multiple storage devices with transparent, fine-grained data placement. Discover how this approach maximizes cumulative storage bandwidth and reduces hardware and software bottlenecks while maintaining critical properties like sharing and security. The presentation shares evaluation results showing impressive performance gains: 1.11X-9.38X for micro-benchmarks and 1.52X-2.02X for real-world applications across various device configurations. Understand how PolyStore addresses the challenges posed by emerging "non-hierarchical" storage media trends.
