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Fast Dynamic Multiple-Set Membership Testing Using Combinatorial Bloom Filters

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4 Author(s)
Fang Hao ; Network Protocols and Systems, Bell Labs, Alcatel-Lucent, Holmdel, United States ; Murali Kodialam ; T. V. Lakshman ; Haoyu Song

In this paper, we consider the problem of designing a data structure that can perform fast multiple-set membership testing in deterministic time. Our primary goal is to develop a hardware implementation of the data structure that uses only embedded memory blocks. Prior efforts to solve this problem involve hashing into multiple Bloom filters. Such approach needs a priori knowledge of the number of elements in each set in order to size the Bloom filter. We use a single-Bloom-filter-based approach and use multiple sets of hash functions to code for the set (group) id. Since a single Bloom filter is used, it does not need a priori knowledge of the distribution of the elements across the different sets. We show how to improve the performance of the data structure by using constant-weight error-correcting codes for coding the group id. Using error-correcting codes improves the performance of these data structures especially when there are a large number of sets. We also outline an efficient hardware-based approach to generate the large number of hash functions that we need for this data structure. The resulting data structure, COMB, is amenable to a variety of time-critical network applications.

Published in:

IEEE/ACM Transactions on Networking  (Volume:20 ,  Issue: 1 )