Journal
IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS
Volume 25, Issue 5, Pages 1155-1165Publisher
IEEE COMPUTER SOC
DOI: 10.1109/TPDS.2013.167
Keywords
Cloud backup; personal storage; source deduplication; deduplication efficiency; application awareness
Funding
- 863 Program of China [2013AA013201]
- National Natural Science Foundation of China [61025009, 61232003, 61120106005, 60903040, 61070198, 61170288]
- China Scholarship Council
- US NSF [CCF-0937993, IIS-0916859, CNS-1016609, CNS-1116606]
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In personal computing devices that rely on a cloud storage environment for data backup, an imminent challenge facing source deduplication for cloud backup services is the low deduplication efficiency due to a combination of the resource-intensive nature of deduplication and the limited system resources. In this paper, we present ALG-Dedupe, an Application-aware Local-Global source deduplication scheme that improves data deduplication efficiency by exploiting application awareness, and further combines local and global duplicate detection to strike a good balance between cloud storage capacity saving and deduplication time reduction. We perform experiments via prototype implementation to demonstrate that our scheme can significantly improve deduplication efficiency over the state-of-the-art methods with low system overhead, resulting in shortened backup window, increased power efficiency and reduced cost for cloud backup services of personal storage.
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