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Middleware adaptation with the Delphoi service
Author(s) -
Maassen Jason,
van Nieuwpoort Rob V.,
Kielmann Thilo,
Verstoep Kees,
den Burger Mathijs
Publication year - 2006
Publication title -
concurrency and computation: practice and experience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 67
eISSN - 1532-0634
pISSN - 1532-0626
DOI - 10.1002/cpe.1022
Subject(s) - middleware (distributed applications) , testbed , computer science , adaptation (eye) , variety (cybernetics) , service (business) , abstraction , grid , quality of service , interface (matter) , architecture , information system , service oriented architecture , grid computing , distributed computing , world wide web , web service , operating system , computer network , engineering , business , marketing , art , philosophy , mathematics , artificial intelligence , maximum bubble pressure method , optics , visual arts , geometry , epistemology , bubble , physics , electrical engineering
Grid middleware needs to adapt to changing resources for a large variety of operations. Currently, however, there is only low‐level information available about Grid resources, coming from various but functionally isolated monitoring and information systems. In this paper, we present the Delphoi service. It provides a unified interface to the necessary information, and also matches the abstraction level needed by middleware services to adapt their behavior. We describe Delphoi's architecture, the information it provides, and we evaluate the quality of its performance information. Delphoi has been developed as part of the EC‐funded GridLab project and is currently being deployed on the project's testbed for adding adaptivity to GridLab's middleware services. Copyright © 2006 John Wiley & Sons, Ltd.