O-Chord: A Method for Locating Relational Data Sources in a P2P Environment

  • Raddad Al King
  • Abdelkader Hameurlain
  • Franck Morvan


Due to the characteristics of Peer-to-Peer systems, SQL query processing in these systems is more complex than traditional distributed DBMS. In this context, semantic and structural heterogeneity of local schemas create a real problem for locating data sources. Schema heterogeneity prevents peers to exchange their data in a comprehensive way. It could lead to incorrect answers for the localization query. In this paper, we propose O-Chord method which integrates domain ontology in Chord protocol [22]. This integration provides comprehensive data exchange while carrying out efficient data sources localization. Our proposed method allows Chord protocol to select the relevant data sources to answer the localization query.


Global Schema Local Schema Domain Ontology Localization Phase Localization Query 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Raddad Al King
    • 1
  • Abdelkader Hameurlain
    • 1
  • Franck Morvan
    • 1
  1. 1.Institut de Recherche en Informatique de Toulouse (IRIT)Université Paul SabatierF-31062 Toulouse Cedex 9France

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