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A study of practical deduplication

Meyer, Dutch T., Bolosky, William J.·2012·ACM Transactions on Storage

Abstract

We collected file system content data from 857 desktop computers at Microsoft over a span of 4 weeks. We analyzed the data to determine the relative efficacy of data deduplication, particularly considering whole-file versus block-level elimination of redundancy. We found that whole-file deduplication achieves about three quarters of the space savings of the most aggressive block-level deduplication for storage of live file systems, and 87% of the savings for backup images. We also studied file fragmentation, finding that it is not prevalent, and updated prior file system metadata studies, finding that the distribution of file sizes continues to skew toward very large unstructured files.

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Metadata

Authors
Meyer, D. T., & Bolosky, W. J.
Venue
ACM Transactions on Storage
Published
2012-01
Volume
7
Issue
4
Pages
1-20
ISSN
  • 1553-3077 (ISSN-L)
  • 1553-3093
OpenAlex
W2110322986
Cited by
476
References
0
FWCI
50.22
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: A study of practical deduplication. https://app.cochat.ai/papers/10.1145/2078861.2078864
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Meyer, D. T., & Bolosky, W. J. (2012). A study of practical deduplication. ACM Transactions on Storage. https://doi.org/10.1145/2078861.2078864

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.