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Proceedings Paper

A hybrid data compression approach for online backup service
Author(s): Hua Wang; Ke Zhou; MingKang Qin
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Paper Abstract

With the popularity of Saas (Software as a service), backup service has becoming a hot topic of storage application. Due to the numerous backup users, how to reduce the massive data load is a key problem for system designer. Data compression provides a good solution. Traditional data compression application used to adopt a single method, which has limitations in some respects. For example data stream compression can only realize intra-file compression, de-duplication is used to eliminate inter-file redundant data, compression efficiency cannot meet the need of backup service software. This paper proposes a novel hybrid compression approach, which includes two levels: global compression and block compression. The former can eliminate redundant inter-file copies across different users, the latter adopts data stream compression technology to realize intra-file de-duplication. Several compressing algorithms were adopted to measure the compression ratio and CPU time. Adaptability using different algorithm in certain situation is also analyzed. The performance analysis shows that great improvement is made through the hybrid compression policy.

Paper Details

Date Published: 23 October 2009
PDF: 10 pages
Proc. SPIE 7517, Photonics and Optoelectronics Meetings (POEM) 2009: Optical Storage and New Storage Technologies, 751703 (23 October 2009); doi: 10.1117/12.843524
Show Author Affiliations
Hua Wang, Huazhong Univ. of Science and Technology (China)
Ke Zhou, Huazhong Univ. of Science and Technology (China)
MingKang Qin, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 7517:
Photonics and Optoelectronics Meetings (POEM) 2009: Optical Storage and New Storage Technologies
Masud Mansuripur; Changsheng Xie; Xiangshui Miao, Editor(s)

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