arXiv:2611.06071 · v1

File-Semantic SSD for I/O-centric Architectures with NFS-over-NVMe Protocol

首次提交 2026-11-04 15:17

版本更新 2026-11-04 15:17

雷达观测 2026-11-05 11:10

摘要

Emerging I/O-centric architectures empower peripheral devices to access storage directly while bypassing the host CPU and kernel. However, SSDs expose only a block interface and rely on the host filesystem for file metadata and access control, making file-level access for applications and peripheral devices inherently difficult in I/O-centric architectures. This tight coupling between the host filesystem and storage device introduces unavoidable software overhead and limits the potential of fully hostless I/O paths. In this paper, we present File-Semantic SSD (FS-SSD), a new SSD architecture that provides a native file abstraction within SSDs, enabling direct file access by peripheral and remote devices without host intervention. FS-SSD adopts the lightweight, stateless NFS interface and introduces NFS-over-NVMe, a protocol extension that embeds NFS operations into the standard NVMe command structure. This allows FS-SSD to support local and remote file I/O through existing PCIe and NVMe-oF transports. Our evaluation shows that FS-SSD provides on-device file abstraction while fully utilizing raw-device bandwidth in I/O-centric architectures.