Supporting quality of service in HTTP servers
PODC '98 Proceedings of the seventeenth annual ACM symposium on Principles of distributed computing
Providing quality of service over the Web: a newspaper-based approach
Selected papers from the sixth international conference on World Wide Web
Protecting the Quality of Service of Existing Information Systems
COOPIS '98 Proceedings of the 3rd IFCIS International Conference on Cooperative Information Systems
Web server support for tiered services
IEEE Network: The Magazine of Global Internetworking
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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.