Web sites are exposed to high rates of incoming requests. The servers may become overloaded during temporary traffic peaks when more requests arrive than the server is designed for. An admission control mechanism rejects some requests whenever the arriving traffic is too high and thereby maintains an acceptable load in the system. This paper presents how admission control mechanisms can be designed with a combination of queueing theory and control theory. In this paper we model an Apache web server as a GI/G/1-system and then design a PI-controller, commonly used in automatic control, for the server. The controller has been implemented as a module inside the Apache source code. Measurements from the laboratory setup show how robust the implemented controller is, and how it corresponds to the results from the theoretical analysis.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Control-theoretic Analysis of Admission Control Mechanisms for Web Server Systems


    Beteiligte:

    Erscheinungsdatum :

    2008-01-01


    Anmerkungen:

    scopus:38349087182
    World Wide Web; 11(1), pp 93-116 (2008) ; ISSN: 1386-145X



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629



    Admission Control Algorithm for Multimedia Server: A Hybrid Approach

    Ahmed, D.T. / Chowdhury, N.M.M.K. / Akbar, M.M. | British Library Online Contents | 2007


    ADMISSION CONTROL DEVICE AND ADMISSION CONTROL METHOD

    FUJISAWA YUKI | Europäisches Patentamt | 2017

    Freier Zugriff

    Call Admission Control for DVB-S2 Systems

    Parraga Niebla, Cristina | AIAA | 2006


    Adaptive admission control in real-time systems

    Ferreira, André Filipe dos Santos / Lima, Solange | BASE | 2009

    Freier Zugriff

    A control theoretic approach to manned-vehicle systems analysis

    Kleinmann, D.L. / Baron, S. / Levison, W.H. | Tema Archiv | 1971