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Model Identification for Energy-Aware Management of Web Service Systems

  • Mara Tanelli
  • Danilo Ardagna
  • Marco Lovera
  • Li Zhang
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5364)

Abstract

In SOA environments, service providers need to comply with the service level objectives stipulated in contracts with their customers while minimizing the operating costs of the physical infrastructure, mainly related to energy costs. The problem can be effectively formalized by using system identification and control theory: the service levels are translated into set-points for the response times of the hosted applications, and performance are traded-off with energy saving objectives based on suitable models for server dynamics. As the behavior of the incoming workload changes significantly within a single business day, control-oriented system identification approaches are very promising to model such systems, especially at a very fine grained time scales and in transient conditions. In this paper Linear Parameter Varying (LPV) state space system identification algorithms are analyzed for modeling Web services systems. The suitability of LPV models is investigated and their performance assessed by experimental data.

Keywords

Request Rate Dynamic Voltage Scaling Linear Parametrically Vary Generalize Processor Sharing Server Response Time 
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-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Mara Tanelli
    • 1
    • 2
  • Danilo Ardagna
    • 1
  • Marco Lovera
    • 1
  • Li Zhang
    • 3
  1. 1.Dipartimento di Elettronica e InformazionePolitecnico di MilanoMilanoItaly
  2. 2.Dipartimento di Ingegneria dell’Informazione e Metodi MatematiciUniversità degli studi di BergamoDalmine (BG)Italy
  3. 3.IBM Research, T.J. Watson Research CenterYorktown Heights

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