GrouPeer: Dynamic clustering of P2P databases

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dc.contributor.author Kantere, V en
dc.contributor.author Tsoumakos, D en
dc.contributor.author Sellis, T en
dc.contributor.author Roussopoulos, N en
dc.date.accessioned 2014-03-01T01:30:50Z
dc.date.available 2014-03-01T01:30:50Z
dc.date.issued 2009 en
dc.identifier.issn 0306-4379 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/19639
dc.subject Peer-to-Peer databases en
dc.subject Query reformulation in P2P databases en
dc.subject Semantics in P2P query answering en
dc.subject Structured data in unstructured P2P overlays en
dc.subject.classification Computer Science, Information Systems en
dc.subject.other Information theory en
dc.subject.other Ketones en
dc.subject.other Automated approaches en
dc.subject.other Challenging problems en
dc.subject.other Dynamic clustering en
dc.subject.other Human interactions en
dc.subject.other Mediated schemata en
dc.subject.other Number of nodes en
dc.subject.other P2P databases en
dc.subject.other P2p networks en
dc.subject.other Peer-to-Peer databases en
dc.subject.other Propagation paths en
dc.subject.other Query reformulation in P2P databases en
dc.subject.other Rewritten queries en
dc.subject.other Schemas en
dc.subject.other Standard practices en
dc.subject.other Structured data in unstructured P2P overlays en
dc.subject.other Structured datums en
dc.subject.other Unstructured P2P en
dc.subject.other Database systems en
dc.title GrouPeer: Dynamic clustering of P2P databases en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.is.2008.04.002 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.is.2008.04.002 en
heal.language English en
heal.publicationDate 2009 en
heal.abstract Sharing structured data in a P2P network is a challenging problem, especially in the absence of a mediated schema. The standard practice of answering a consecutively rewritten query along the propagation path often results in significant loss of information. On the opposite, the use of mediated schemas requires human interaction and global agreement, both during creation and maintenance. In this paper we present GrouPeer, an adaptive, automated approach to both issues in the context of unstructured P2P database overlays. By allowing peers to individually choose which rewritten version of a query to answer and evaluate the received answers, information-rich sources left hidden otherwise are discovered. Gradually, the overlay is restructured as semantically similar peers are clustered together. Experimental results show that our technique produces very accurate answers and builds clusters that are very close to the optimal ones by contacting a very small number of nodes in the overlay. (c) 2008 Elsevier B.V. All rights reserved. en
heal.journalName Information Systems en
dc.identifier.doi 10.1016/j.is.2008.04.002 en
dc.identifier.isi ISI:000262892200004 en
dc.identifier.volume 34 en
dc.identifier.issue 1 en
dc.identifier.spage 62 en
dc.identifier.epage 86 en

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