Z-LFS: A Zoned Namespace-tailored Log-structured File System for Commodity Small...
summary
Z-LFS is a Linux-kernel file system built on F2FS for commodity small-zone ZNS SSDs that implements append-only metadata, speculative log stream management, and conflict-aware zone allocation. It targets 96 MB zones with up to 384 active zones, stripes writes across “super zones” to avoid channel/die conflicts, dynamically scales active-zone counts per log stream, and garbage-collects delta metadata logs. Evaluated on real devices, it claims up to 33.44× speedup over F2FS and 3.5× over a state-of-the-art ZNS interface in their benchmarks.
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