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A Five-Year Study of File-System Metadata

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A Five-Year Study of File-System Metadata
For five years, we collected annual snapshots of filesystem metadata from over 60,000 Windows PC file systems in a large corporation. In this paper, we use these snapshots to study temporal changes in file size, file age, file-type frequency, directory size, namespace structure, file-system population, storage capacity and consumption, and degree of file modification. We present a generative model that explains the namespace structure and the distribution of directory sizes. We find significant temporal trends relating to the popularity of certain file types, the origin of file content, the way the namespace is used, and the degree of variation among file systems, as well as more pedestrian changes in sizes and capacities. We give examples of consequent lessons for designers of file systems and related software.
Nitin Agrawal, William J. Bolosky, John R. Douceur
Added 29 Oct 2010
Updated 29 Oct 2010
Type Conference
Year 2007
Where FAST
Authors Nitin Agrawal, William J. Bolosky, John R. Douceur, Jacob R. Lorch
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