Abstract
The problem of detecting the most frequent items in large data sets and providing accurate frequency estimates for those items is becoming more and more important in a variety of domains. We propose a new two-list framework for addressing this problem, which extends the state-of-the-art Filtered Space-Saving (FSS) algorithm. An algorithm called FSSA giving an efficient array-based implementation of this framework is presented. An adaptive version of this algorithm is also presented, which adjusts the relative sizes of the two lists based on the estimated number of distinct keys in the data set. Analytical comparison with the FSS algorithm showed that FSSA has smaller expected frequency estimation errors, and experiments on both artificial and real workloads confirm this result. A theoretical analysis of space and time complexity for FSSA and its benchmark algorithms was performed. Finally, we showed that FSS2L framework can be naturally parallelized, leading to a linear decrease in the maximum frequency estimation error.
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Vengerov, D. (2018). A Two-List Framework for Accurate Detection of Frequent Items in Data Streams. In: Perner, P. (eds) Machine Learning and Data Mining in Pattern Recognition. MLDM 2018. Lecture Notes in Computer Science(), vol 10934. Springer, Cham. https://doi.org/10.1007/978-3-319-96136-1_19
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DOI: https://doi.org/10.1007/978-3-319-96136-1_19
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