On Efficient Query Processing of Stream Counts on the Cell Processor

In recent years, the sketch-based technique has been presented as an effective method for counting stream items on processors with limited storage and processing capabilities, such as the network processors. In this paper, we examine the implementation of a sketch-based counting algorithm on the heterogeneous multi-core Cell processor. Like the network processors, the Cell also contains on-chip special processors with limited local memories. These special processors enable parallel processing of stream items using short-vector dataparallel (SIMD) operations. We demonstrate that the inaccuracies of the estimates computed by straightforward adaptations of current sketch-based counting approaches are exacerbated by increased inaccuracies in approximating counts of low frequency items, and by the inherent space limitations of the Cell processor. To address these concerns, we implement a sketch-based counting algorithm, FCM, that is specifically adapted for the Cell processor architecture. ...

• Type: Conference
• Year: 2009
• Where: ICDE
• Authors: Dina Thomas, Rajesh Bordawekar, Charu C. Aggarwal, Philip S. Yu
• Keywords: Database, ICDE 2009, Low Frequency Items, On-chip Special Processors, Processors Enable Parallel, Sketch-based Counting Algorithm, Stream Counting Algorithm