Sub-contracts: Delegating Contracts for Resource Discovery

  • Javier Bustos-Jimenez
  • Cristian Varas
  • Jose Piquer

Grid Computing promised to present a large number of resources distributed on a world-area network, ready to be used by a single user: that promise is true. Now, the problem has moved to the user side, because a normal user normally knows at most only his organization’s resources, and those numbers of resources are often not enough for his purposes. Defining a Virtual Organization (VO) as a set of scientific resources, processors, clusters and Grids which are available to the user, we study the problem of resource discovery for VOs in a distributed approach. Viewing a VO-to-VO network as a Peer-to-Peer network, we present our solution based on the use of contracts to perform the query and assignment, delegating contracts if the query cannot be fully handled. We first present a blind scheme of delegation (that is, without knowing of neighbors’ resource availability), evaluating it by simulations, and showing that it is not necessary to delegate the query to all neighbors to handle it. Then, a scheme knowing only direct neighbors which uses the blind scheme is presented. Finally, we will give recommendations and extensions of our scheme to improve the resource discovery process.

Keywords

Grid resource discovery contracts delegation 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Javier Bustos-Jimenez
    • 1
  • Cristian Varas
    • 1
  • Jose Piquer
    • 2
  1. 1.Escuela de Ingenieria InformaticaUniversidad Diego PortalesChile
  2. 2.Departamento de Ciencias de la ComputacionUniversidad de ChileChile

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