A High-Performance and Scalable Userspace Log-Structured File System for Modern SSDs

doi:10.1145/3728645

CSpace

	A High-Performance and Scalable Userspace Log-Structured File System for Modern SSDs
	Jia, Wenqing 1,2; Jiang, Dejun 1,2,3; Xiong, Jin 1,2
	2025-11-01
发表期刊	ACM TRANSACTIONS ON STORAGE
ISSN	1553-3077
卷号	21 期号:4 页码:41
摘要	We present AuGEFS, a scalable userspace log-structured file system for modern SSDs. AuGEFS re-architects the file system stack to address three critical challenges: inefficient control plane, limited metadata scalability, and underutilized device bandwidth. First, we propose a shared and protected address space within the userspace of accessing applications to run AuGEFS, which enables the high-performance data plane and efficient control plane. Second, we design a scalable LSM-tree based key-value store called METADB to organize small-sized metadata in AuGEFS. To improve the metadata scalability, METADB employs parallel request processing to reduce thread synchronization overhead and fine-grained parallel write-ahead log to eliminate false sharing in metadata persistence. Finally, AuGEFS distributes files into different domains. To reduce contention, we maintain space management metadata for each domain independently, which helps scale data performance and improve the device IO utilization. Moreover, AuGEFS designs an asynchronous IO stack for fsync to reduce the latency of synchronous writes. The evaluation results show that AuGEFS significantly improves both metadata scalability and data scalability.
关键词	SSD userspace file system scalability
DOI	10.1145/3728645
收录类别	SCI
语种	英语
WOS研究方向	Computer Science
WOS类目	Computer Science, Hardware & Architecture ; Computer Science, Software Engineering
WOS记录号	WOS:001631767000006
出版者	ASSOC COMPUTING MACHINERY
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/42946
专题	中国科学院计算技术研究所
通讯作者	Jia, Wenqing
作者单位	1.Chinese Acad Sci, Inst Comp Technol, State Key Lab Processors, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Zhongguancun Lab, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Jia, Wenqing,Jiang, Dejun,Xiong, Jin. A High-Performance and Scalable Userspace Log-Structured File System for Modern SSDs[J]. ACM TRANSACTIONS ON STORAGE,2025,21(4):41.
APA	Jia, Wenqing,Jiang, Dejun,&Xiong, Jin.(2025).A High-Performance and Scalable Userspace Log-Structured File System for Modern SSDs.ACM TRANSACTIONS ON STORAGE,21(4),41.
MLA	Jia, Wenqing,et al."A High-Performance and Scalable Userspace Log-Structured File System for Modern SSDs".ACM TRANSACTIONS ON STORAGE 21.4(2025):41.