Approaches to Support Differentiated Quality of Web Service

  • Sook-Hyun Ryu
  • Jae-Young Kim
  • James Won-Ki Hong
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2156)


The exponential rise in the number of Web users has inspired the creation of a diversity of Web applications. Hence, Web Quality of Service (QoS) is an increasingly critical issue in Web services, such as e-commerce, Web hosting, etc. In the future, improved QoS will be linked to a fee for service. Customers expect their requests to be served with a quality proportional to the amount charged to their accounts. Because most Web servers currently process requests on a first-come, first-serve basis, they do not provide differentiated QoS. This paper presents two approaches to implement differentiated quality of Web service. In the user-level approach, the Web server is modified to include a classification process, priority queues and a scheduler. However, with this approach, it is difficult to achieve portability. In this paper, a new, portable user-level approach is presented. In the kernel-level approach, a real-time scheduler to support prioritized user requests has been added to the operating system kernel. Prototype implementations for two approaches have been developed and their performances are evaluated.


Priority Queue User Request Request Rate Universal Resource Locator Priority Request 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Sook-Hyun Ryu
    • 1
  • Jae-Young Kim
    • 1
  • James Won-Ki Hong
    • 1
  1. 1.Department of Computer Science and EngineeringPohang University of Science and TechnologyPohangKorea

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