From Local Impact Functions to Global Adaptation of Service Compositions

Abstract. The problem of self-optimization and adaptation in the context of customizable systems is becoming increasingly important with the emergence of complex software systems and unpredictable execution environments. Here, a general framework for automatically deciding on when and how to adapt a system whenever it deviates from the desired behavior is presented. In this framework, the adaptation targets of the system are described in terms of a high-level policy that establishes goals for a set of performance indicators. The decision process is based on information provided independently for each service that describes the available adaptations, their impact on performance indicators, and any limitations or requirements. The technique consists of both offline and online phases. Offline, rules are generated specifying service adaptations that may help to achieve the specified goals when a given change in the execution context occurs. Online, the corresponding rule is evaluated when...

• Type: Conference
• Year: 2009
• Where: SSS
• Authors: Liliana Rosa, Luís Rodrigues, Antónia Lopes, Matti A. Hiltunen, Richard D. Schlichting
• Keywords: Complex Software Systems, Performance Indicators, SSS 2009, Unpredictable Execution Environments