GrouPeer: Dynamic clustering of P2P databases

Kantere, V; Tsoumakos, D; Sellis, T; Roussopoulos, N

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.publisher	PERGAMON-ELSEVIER SCIENCE LTD	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