WineFS

Kadekodi, Rohan; Kadekodi, Saurabh; Ponnapalli, Soujanya; Shirwadkar, Harshad; Ganger, Gregory R.; Kolli, Aasheesh; Chidambaram, Vijay

doi:10.1145/3477132.3483567

Cited by 26 publications

(1 citation statement)

References 15 publications

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“…多层的抽象一方面导致软件的冗余, 另一方面也使得存储引擎无法近年来, 人们对基于 PM 的文件系统和数据库进行了大量的研究. 研究者们提出了许多 PM-aware 的文件系统, 如 PMFS [41] , NOVA [27] , SplitFS [38] 和 WineFS [42] , 并利用 PM 的可字节寻址能力消除面向块的存储成本. 这些系统还支持创建内存映射文件, 并通过 CPU 的 load/store 等指令 [15] 8) .…”

Section: 存储软件栈unclassified

Structured storage for ubiquitous operating systems

FAN,

YAN,

WENG

2024

Sci. Sin.-Inf.

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范晓鹏等: 面向泛在操作系统的结构化存储在泛在操作系统环境中, 面临着 "端 (终端设备) -边 (边缘端) -云 (云端)" 3 个层次的存储需求. 在 3 个层级上均存在大量的结构化数据的存储需求. 端侧设备呈现资源极端化和异构化等特性, 需要存储系统具备模块化和强适配性, 在边/云侧可以部署新型存储设备来加速 I/O 处理, 满足泛在应用的低时延和实时性需求. 通行的解决方案是在字节流的文件系统基础之上实现结构化存储. 然而, 这种传统解决方案存在诸多挑战, 难以满足泛在场景需求. 面向端侧的结构化数据存储.(1) I/O 放大严重. 终端设备上的结构化数据管理依赖于堆叠式的软件栈, 导致了严重的输入/输出 (input/output, I/O) 放大, 这不仅降低了带宽利用率, 还缩短了设备的寿命. 堆叠式软件栈使得 I/O 路径复杂, 造成大量冗余开销, 无法满足泛在应用的 I/O 时效性需求.

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Section: 存储软件栈unclassified

Structured storage for ubiquitous operating systems

FAN,

YAN,

WENG

2024

Sci. Sin.-Inf.

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A performance study of optane persistent memory: from storage data structures' perspective

2022

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CFFS: A Persistent Memory File System for Contiguous File Allocation With Fine-Grained Metadata

Liu

Wang

2022

IEEE Access

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Extensive research on persistent memory (PM)-aware file systems has led to the development of numerous methods for improving read/write throughput. In particular, accessing or modifying file contents in a similar manner to the memory operations through mmap is a common approach. We designed a file system, CFFS (Contiguous File Allocation with Fine-Grained Metadata File System), to rapidly allocate PM pages to upper layer applications for mmap and to alleviate page fault overheads due to mmap. We optimized the physical contiguity of files in PM to reduce file fragmentation and increase fragment alignment with the goal of reducing software overhead. To achieve this goal, we implemented greedybased buddy systems and implicit preallocation with a not-most-recently-used (NMRU) policy based on our overall page allocation strategy of considering not only the spatial but also the temporal locality of file access patterns. Furthermore, for efficient and atomic metadata operations, we fully leveraged the byte-addressable property of PM to design fine-grained metadata. CFFS adopts persistent doubly linked lists for directory operations to identify and recover from inconsistencies caused by system failures, doing so without using traditional log mechanisms. In experiments, CFFS showed superior page allocation performance to EXT4-DAX and NOVA did under different PM fragmentation levels. Our allocation algorithm also reduced the cost of page faults for frequently appended files. Finally, CFFS's lightweight directory operations performed excellently in creating and deleting files of various quantities. In summary, the main contribution of the paper is proposing an efficient page allocation algorithm to improve the performance of subsequent mmaps, based on the strategy of considering not only the spatial but also the temporal locality of file access patterns in PM file systems. Another contribution was the fine-grained and log-free method for atomic directory operations.

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WineFS

Cited by 26 publications

References 15 publications

Structured storage for ubiquitous operating systems

Structured storage for ubiquitous operating systems

A performance study of optane persistent memory: from storage data structures' perspective

CFFS: A Persistent Memory File System for Contiguous File Allocation With Fine-Grained Metadata

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