Optimizing File Systems on Heterogeneous Memory - Integrating DRAM Cache with Virtual Memory Management

Explore a 21-minute conference talk from FAST '24 that delves into optimizing file systems on heterogeneous memory. Learn about FLAC, a novel cache management layer that integrates DRAM cache with virtual memory management. Discover how the researchers developed zero-copy caching and parallel-optimized cache management techniques to enhance data transfer between file systems and applications, as well as improve data synchronization and migration between DRAM and persistent memory (PM). Examine the implementation of FlacFS, a library file system built upon FLAC, and its performance improvements over existing file systems. Gain insights into the comprehensive analysis of cache-based and DAX-based designs, and understand how FLAC addresses their limitations. Review micro-benchmark results showing up to two orders of magnitude performance improvement in file read/write operations, and explore real-world application scenarios where FlacFS achieves significant speedups over state-of-the-art file systems.