2nd International ICST Conference on Scalable Information Systems

Research Article

An Adaptive Admission Control Policy for Geographically Distributed Web Systems

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  • @INPROCEEDINGS{10.4108/infoscale.2007.976,
        author={Novella Bartolini and Giancarlo Bongiovanni and Simone Silvestri},
        title={An Adaptive Admission Control Policy for Geographically Distributed Web Systems},
        proceedings={2nd International ICST Conference on Scalable Information Systems},
        proceedings_a={INFOSCALE},
        year={2010},
        month={5},
        keywords={Adaptive admission control self-configuration autonomic computing quality of service},
        doi={10.4108/infoscale.2007.976}
    }
    
  • Novella Bartolini
    Giancarlo Bongiovanni
    Simone Silvestri
    Year: 2010
    An Adaptive Admission Control Policy for Geographically Distributed Web Systems
    INFOSCALE
    ICST
    DOI: 10.4108/infoscale.2007.976
Novella Bartolini1,*, Giancarlo Bongiovanni1,*, Simone Silvestri1,*
  • 1: Department of Computer Science - University of Rome "La Sapienza", Italy
*Contact email: bartolini@di.uniroma1.it, bongiovanni@di.uniroma1.it, simone.silvestri@di.uniroma1.it

Abstract

This paper deals with the problem of admission control for geographically distributed web servers in presence of several access routers. The main contribution of this paper is the proposal of a scalable admission control scheme with the purpose to accept as many new sessions as possible within the constraints on response time imposed by service level agreements. The proposed policy autonomously configures and periodically adapts its component level parameters to the time-varying traffic situations. Extensive simulations of our policy show that our algorithm always guarantees the adherence to SLAs under different traffic scenarios. The proposed method shows a stable behavior during overload by smoothing flash crowd effects. It also improves the successful session termination probability and the utilization of system resources when compared to other traditional admission control schemes.