HiNFS: A Persistent Memory File System with Both Buffering and Direct-Access

摘要

Persistent memory provides data persistence at main memory with emerging non-volatile main memories (NVMMs). Recent persistent memory file systems aggressively use direct access, which directly copy data between user buffer and the storage layer, to avoid the double-copy overheads through the OS page cache. However, we observe they all suffer from slow writes due to NVMMs' asymmetric read-write performance and much slower performance than DRAM.