Fast counting the cardinality of flows for big traffic over sliding windows
Jingsong SHAN , Yinjin FU , Guiqiang NI , Jianxin LUO , Zhaofeng WU
Front. Comput. Sci. ›› 2017, Vol. 11 ›› Issue (1) : 119 -129.
Fast counting the cardinality of flows for big traffic over sliding windows
Counting the cardinality of flows for massive high-speed traffic over sliding windows is still a challenging work under time and space constrains, but plays a key role in many network applications, such as traffic management and routing optimization in software defined network. In this paper, we propose a novel data structure (called LRU-Sketch) to address the problem. The significant contributions are as follows. 1) The proposed data structure adapts a well-known probabilistic sketch to sliding window model; 2) By using the least-recently used (LRU) replacement policy, we design a highly time-efficient algorithm for timely forgetting stale information, which takes constant (O(1)) time per time slot; 3) Moreover, a further memory-reducing schema is given at a cost of very little loss of accuracy; 4) Comprehensive experiments, performed on two real IP trace files, confirm that the proposed schema attains high accuracy and high time efficiency.
probabilistic data structure / sketch / streaming data / cardinality / flow
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Higher Education Press and Springer-Verlag Berlin Heidelberg
Supplementary files
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