DBGlobe: a service-oriented P2P system for global computing

ABSTRACT

The challenge of peer-to-peer computing goes beyond simple file sharing. In the DBGlobe project, we view the multitude of peers carrying data and services as a superdatabase. Our goal is to develop a data management system for modeling, indexing and querying data hosted by such massively distributed, autonomous and possibly mobile peers. We employ a service-oriented approach, in that data are encapsulated in services. Direct querying of data is also supported by an XML-based query language. In this paper, we present our research results along the following topics: (a) infrastructure support, including mobile peers and the creation of context-dependent communities, (b) metadata management for services and peers, including location-dependent data, (c) filters for efficiently routing path queries on hierarchical data, and (d) querying using the AXML language that incorporates service calls inside XML documents.

REFERENCES

• 1: The DBGlobe Project, http://softsys.cs.uoi.gr/dbglobe/
• 2: D. S. Milojicic, V. Kalogeraki, R. Lukose, K. Nagaraja, J. Pruyne, B. Richard, S. Rollins, and Z. Xu. "Peer-to-Peer Computing", HP Technical Report, HPL-2002-57.
• 3: Efstratios Valavanis , Christopher Ververidis , Michalis Vazirgianis , George C. Polyzos , Kjetil Nrvåg, MobiShare: Sharing Context-Dependent Data and Services from Mobile Sources, Proceedings of the IEEE/WIC International Conference on Web Intelligence, p.263, October 13-17, 2003
• 4: Dieter Pfoser , Evaggelia Pitoura , Nectaria Tryfona, Metadata modeling in a global computing environment, Proceedings of the 10th ACM international symposium on Advances in geographic information systems, November 08-09, 2002, McLean, Virginia, USA [doi>10.1145/585147.585162]
• 5: G. Koloniari and E. Pitoura, "Bloom-Filters for Hierarchical Data", Proceeding of the 5th Workshop on Distributed Data and Structures (WDAS), 2003
• 6: The Active XML webpage, http://www-rocq.inria.fr/verso/Gemo/Projects/axml/
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• 9: Tova Milo , Serge Abiteboul , Bernd Amann , Omar Benjelloun , Fred Dang Ngoc, Exchanging intensional XML data, Proceedings of the 2003 ACM SIGMOD international conference on Management of data, June 09-12, 2003, San Diego, California [doi>10.1145/872757.872793]
• 10: Serge Abiteboul , Angela Bonifati , Grégory Cobéna , Ioana Manolescu , Tova Milo, Dynamic XML documents with distribution and replication, Proceedings of the 2003 ACM SIGMOD international conference on Management of data, June 09-12, 2003, San Diego, California [doi>10.1145/872757.872821]
• 11: G. Koloniari and E. Pitoura. "Filters for XML-based Service Discovery in Pervasive Computing", submitted.
• 12: Universal Description, Discovery, and Integration of Business for the Web, http://www.uddi.org

INDEX TERMS

Keywords:
global computing, metadata, peer-to-peer computing, peer-to-peer databases, pervasive computing, services, ubiquitous computing