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This conference talk from USENIX FAST '25 presents NVLog, an innovative NVM-based write-ahead log designed to enhance disk file systems. Explore how researchers from Jilin University developed a transparent solution that elegantly integrates non-volatile memory into legacy storage stacks without requiring extensive modifications. Learn about NVLog's key features including on-demand byte-granularity sync absorption, efficient log structure, heterogeneous crash consistency mechanisms, small write optimizations, and robust crash recovery methods. The presentation demonstrates how NVLog accelerates disk file systems by up to 15.09x while outperforming competing solutions like NOVA and SPFS by up to 3.72x and 324.11x respectively. Discover how this lightweight approach leverages the mature kernel software stack while avoiding data migration overhead, offering a practical path to boosting file system performance.
