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Distributed Identification of Top-l Inner Product Elements and its Application in a Peer-to-Peer Network

IEEE Transactions on Knowledge and Data EngineeringPublished 29 February 2008
Kunal Das, Kanishka Bhaduri, K. Liu, H. Kargupta
Citations31
SJR quartileQ1
SJR score2.57
SNIP3.30

TL;DR

An approximate local algorithm for identifying top-l, inner products among pairs of feature vectors in a large asynchronous distributed environment such as a peer-to-peer (P2P) network is presented and a probabilistic algorithm for this purpose is developed using order statistics and the Hoeffding bound.

Abstract

The inner product measures how closely two feature vectors are related. It is an important primitive for many popular data mining tasks, for example, clustering, classification, correlation computation, and decision tree construction. If the entire data set is available at a single site, then computing the inner product matrix and identifying the top (in terms of magnitude) entries is trivial. However, in many real-world scenarios, data is distributed across many locations and transmitting the data to a central server would be quite communication intensive and not scalable. This paper presents an approximate local algorithm for identifying top-l, inner products among pairs of feature vectors in a large asynchronous distributed environment such as a peer-to-peer (P2P) network. We develop a probabilistic algorithm for this purpose using order statistics and the Hoeffding bound. We present experimental results to show the effectiveness and scalability of the algorithm. Finally, we demonstrate an application of this technique for interest-based community formation in a P2P environment.

Keywords

Computer SciencePhysics and Astronomy