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Title: Querying Peer-to-Peer Networks Using P-Trees
Authors: Crainiceanu, Adina
Linga, Prakash
Gehrke, Johannes
Shanmugasundaram, Jayavel
Keywords: computer science
technical report
Issue Date: 5-Feb-2004
Publisher: Cornell University
Abstract: Peer-to-peer (P2P) systems provide a robust, scalable and decentralized way to share and publish data. However, most existing P2P systems only provide a very rudimentary query facility; they only support equality or keyword search queries over files. We believe that future P2P applications, such as resource discovery on a grid, will require more complex query functionality. As a first step towards this goal, we propose a new distributed, fault-tolerant P2P index structure for resource discovery applications called the P-tree. P-trees efficiently evaluate range queries in addition to equality queries. We describe algorithms to maintain a P-tree under insertions and deletions of data items/peers, and evaluate its performance using both a simulation and a real distributed implementation. Our results show the efficacy of our approach.
Appears in Collections:Computing and Information Science Technical Reports

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