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TBF: A High-Efficient Query Mechanism in De-duplication Backup System

  • Bin Zhou
  • Hai Jin
  • Xia Xie
  • PingPeng Yuan
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7296)

Abstract

For the big data, the fingerprints of the data chunks are very huge and cannot be stored in the memory completely. Accordingly, a new query mechanism namely Two-stage Bloom Filter mechanism is proposed. First, each bit of the second grade bloom filter represents the chunks having the identical fingerprints which reducing the rate of false positives. Second, a two-dimensional list is created corresponding to the two grade bloom filter to gather the absolute addresses of the data chunks with the identical fingerprints. Finally, we suggest a new hash function class with the strong global random characteristic. Two-stage Bloom Filter decreases the number of accessing disks, improves the speed of detecting the redundant data chunks, and reduces the rate of false positive. Our experiments indicate that Two-stage Bloom Filter reduces about 30~40% storage accessing of false positive with the same length of the first grade Bloom Filter.

Keywords

Two-stage Bloom Filter Standard Bloom Filter De-duplication False positive Fingerprint 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Bin Zhou
    • 1
    • 2
  • Hai Jin
    • 1
  • Xia Xie
    • 1
  • PingPeng Yuan
    • 1
  1. 1.Services Computing Technology and System Lab, Cluster and Grid Computing Lab, School of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhanChina
  2. 2.School of Computer Science and TechnologySouth-Central University for NationalitiesWuhanChina

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