Software adaptation for service-oriented systems
Proceedings of the 1st workshop on Middleware for Service Oriented Computing (MW4SOC 2006)
Applying process migration on a BSP-based LU decomposition application
VECPAR'10 Proceedings of the 9th international conference on High performance computing for computational science
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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.