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HMVFS: A Hybrid Memory Versioning File System

机译:HMVFS:混合内存版本控制文件系统

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The byte-addressable Non-Volatile Memory (NVM) offers fast, fine-grained access to persistent storage, and a large volume of recent researches are conducted on developing NVM-based in-memory file systems. However, existing approaches focus on low-overhead access to the memory and only guarantee the consistency between data and metadata. In this paper, we address the problem of maintaining consistency among continuous snapshots for NVM-based in-memory file systems. We propose a Hybrid Memory Versioning File System (HMVFS) that achieves fault tolerance efficiently and has low impact on I/O performance. Our results show that HMVFS provides better performance on snapshotting compared with the traditional versioning file systems for many workloads. Specifically, HMVFS has lower snapshotting overhead than BTRFS and NILFS2, improving by a factor of 9.7 and 6.6, respectively. Furthermore, HMVFS imposes minor performance overhead compared with the state-of-the-art in-memory file systems like PMFS.
机译:字节可寻址非易失性内存(NVM)提供对持久性存储的快速,细粒度访问,并且有关开发基于NVM的内存中文件系统的大量最新研究正在进行。但是,现有方法侧重于对内存的低开销访问,并且仅保证数据和元数据之间的一致性。在本文中,我们解决了基于NVM的内存文件系统在连续快照之间保持一致性的问题。我们提出了一种混合内存版本控制文件系统(HMVFS),该系统可有效实现容错能力,并且对I / O性能的影响很小。我们的结果表明,相比于许多工作负载的传统版本控制文件系统,HMVFS在快照上提供了更好的性能。具体而言,与BTRFS和NILFS2相比,HMVFS的快照开销较低,分别提高了9.7和6.6倍。此外,与最新的内存文件系统(例如PMFS)相比,HMVFS的性能开销较小。

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