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Efficiently Mining Frequent Item Sets On Massive Data

EFFICIENTLY MINING FREQUENT ITEM SETS ON MASSIVE DATA

  • Project Code :
  • TCREPY19_30
  • .

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EFFICIENTLY MINING FREQUENT ITEM SETS ON MASSIVE DATA

Efficiently mining frequent item sets on massive data

Abstract

Frequent item set mining is an important operation to return all item sets in the transaction table, which occur as a subset of at least a specified fraction of the transactions. The existing algorithms cannot compute frequent item sets on massive data efficiently, since they either require multiple-pass scans on the table, or construct complex data structures which normally exceed the available memory on massive data. This paper proposes a novel precomputation based PFIM algorithm to compute the frequent item sets quickly on massive data. PFIM treats the transaction table as two parts: the large old table storing historical data and the relatively small new table storing newly generated data. PFIM first pre-constructs the quasi frequent item sets on the old table whose supports are above the lower-bound of the practical support level. Given the specified support threshold, PFIM can quickly return the required frequent item sets on the table by utilizing the quasi-frequent item sets. Three pruning rules are presented to reduce the size of the involved candidates. An incremental update strategy is devised to efficiently re-construct the quasi-frequent item sets when the tables are merged. The extensive experimental results, conducted on synthetic and real-life data sets, show that PFIM has a significant advantage over the existing algorithms and runs two orders of magnitude faster than the latest algorithm.

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