Alternatives to conjunctive query processing in peer-to-peer file-sharing systems
Proceedings of the 2009 ACM symposium on Applied Computing
A resources virtualization approach supporting uniform access to heterogeneous grid resources
EUROCAST'07 Proceedings of the 11th international conference on Computer aided systems theory
Polymorphic queries for P2P systems
Information Systems
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Decentralized and unstructured peer-to-peer (P2P) networkssuch as Gnutella are attractive for Internet-scale informationretrieval and search systems because they requireneither any centralized directory nor any centralized managementof overlay network topology and data placement.However, due to this decentralized architecture, currentP2P keyword search systems lack useful global knowledgesuch as popularity of data items and relationships betweenkeywords and data items. As a result, current P2P keywordsearch systems supports only naive text-match search andcan find only data items with a keyword (or meta-data) exactlyindicated in a query.In this paper, we show an efficient P2P search systemwhich increases possibility of discovering desired dataitems. The key mechanism is query expansion, where a receivedquery is expanded based on keyword relationshipsmanaged in a distributed fashion by participating nodes.Keyword relationships are improved through search and retrievalprocesses and each relashionship is shared amongnodes holding similar data items. We also present implementationof our P2P search system.