In order to improve the QoS of applications, clusters of web servers are increasingly used in web services. Caching helps improve performance in web servers, but is largely exploited only for static web content. With more web applications using backend databases today, caching of dynamic content has a crucial role in web performance. This paper presents a set of cache management schemes for han...

Many web hosting companies do not load balance their web servers. The reason is that current web server load balancing techniques are expensive. Website migration is a costeffective and simple load balancing solution for web hosting companies that host web sites whose load is small in comparison the capacity of a web server. The main objectives of website migration is to reduce the average late...

The proliferation of web services; and users appeal for high scalability, availability and reliability of web servers to provide rapid response and high throughput for the Clients’ requests occurring at anytime. Distributed Web Servers (DWSs) provide an effective solution for improving the quality of web services. This paper addresses un-regulated jobs/tasks migration among the servers. Conside...

Software agents have been recognized as one of the main building blocks of the emerging infrastructure for the Semantic Web, but their relationship with more standard components, such as Web servers and clients, is still not clear. At the server side, a possible role for agents is to enhance the capabilities of servers using their intelligence to provide more complex services and behaviors. In ...

Under high loads, a Web server may be servicing many hundreds of connections concurrently. In traditional web servers, the question of the order in which concurrent connections are serviced has been left to the operating system. In this report we examine the performance of a policy that gives preferential service to short connections. We start by finding out the typical service times for CPU, d...

The power consumption of web servers and associated security devices is becoming an increasing issue both from an economic and environmental perspective. This paper analyses the power consumption of both security software and web server software and concludes that traditional architectures waste energy with repeated transitions up and down the TCP/IP stack. This contention is proved by comparin...

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Under high loads, a Web server may be servicing many hundreds of connections concurrently. In traditional Web servers, the question of the order in which concurrent connections are serviced has been left to the operating system. In this paper we ask whether servers might provide better service by using non-traditional service ordering. In particular, for the case when a Web server is serving st...

This note briefly summarizes some results from two papers: [4] and [23]. These papers pose the following question: Is it possible to reduce the expected response time of every request at a web server, simply by changing the order in which we schedule the requests? In [4] we approach this question analytically via an M/G/1 queue. In [23] we approach the same question via implementation involving...