The phenomenal growth in popularity of the World Wide Web (WWW, or the Web) has made WWW traac the largest contributor to packet and byte traac on the NSFNET backbone. This growth has triggered recent research aimed at reducing the volume of network traac produced by Web clients and servers, by using caching, and reducing the latency for WWW users, by using improved protocols for Web interactio...

In this paper we describe our experience at Colorado State University running hundreds of virtual Linuxt servers on an IBM S/390t mainframe with the z/VMt operating system and the way we solved the security, performance, and administration problems that were encountered. With the large increase in the number of Web-based systems in the last decade, the computational requirements for supporting ...

During recent years web servers evolved from providing simple, static content to offering different services and a variety of dynamically generated pages and objects. Consequently, scalability and load-balancing have emerged as main requirements for modern web farms. A common solution is based on placing a Web Switch in front of the web servers; the switch acts as a dispatcher that redirects us...

The Asprox infection weaves a complex chain of dependencies involving bots that perform SQL injections on vulnerable web servers, and visitors whose machines get compromised simply by visiting infected websites. Using real-world data sets, we study Asprox bots, infected web servers, and the malicious infrastructure behind Asprox propagation. We find that themalware-propagation infrastructure in...

Distributed web servers on the immensely expanding Internet require high scalability and availability to provide efficient services to millions of clients on the web. To provide rapid responses to enormous number of client requests, load balancing is an important technique to evenly distribute the requests to web servers. In this paper, we propose a framework called MALD (Mobile Agent based Loa...

A considerable and growing fraction of servers, especially of web servers, is hosted in compute clouds. In this paper we opportunistically leverage this trend to improve privacy of clients from network attackers residing between the clients and the cloud: We design a system that can be deployed by the cloud operator to prevent a network adversary from determining which of the cloud’s tenant ser...

Content distribution on the Web is moving from an architecture where objects are placed on a single, designated server to an architecture where objects are replicated on geographically distributed servers and clients transparently access a nearby copy of an object. In this paper we study how the di erent redirection schemes used in modern content distribution networks a ect the user-perceived p...

The cost of computer systems has decreased continuously in recent years, leading to an exponential growth in the number of computer users. In such an environment, more and more Web servers have been created offering many types of information. As a result Internet traffic has grown significantly, affecting the quality of the services offered by the Web servers. We propose a new approach for desi...

Access latency and load balancing are the two main issues in the design of clustered Web server architecture for achieving high performance. In this paper, we propose a new document distribution algorithm for load balancing on a cluster of distributed Web servers. We group Web pages that are likely to be accessed during a request session into a migrating unit, which is used as the basic unit of...

In this paper a new mechanism for mapping data items onto the storage devices of a parallel web server is presented. The method is based on careful observation of the eeects that limit the performance of parallel web servers, and by studying the access patterns for these servers. On the basis of these observations, a graph theoretic concept is developed , and partitioning algorithms are used to...