This proposal presents an approach for power and performance management in a platform running multiple independent network applications, such as web-based applications. The approach assumes a virtualized server cluster environment and includes an associated optimization model and strategy developed to dynamically configure the applications over the processor’s cluster. The optimization aims to ...

We have developed a distributed search engine, called Cooperative Search Engine (CSE), in order to retrieve fresh information. In CSE, a local search engine located in each Web server makes an index of local pages. And, a Meta search server integrates these local search engines in order to realize a global search engine. In such a way, the communication delay occurs at retrieval time. So, we ha...

Because of the fast growing volume of web documents during the past decades, the efficiency of the web search engine has become more crucial than ever. Such efficiency can be estimated with both factors of the query relevance of search results answered and the financial cost for query processing. Between them, the ways for improving query relevance of web searches have been intensively studied ...

One problem with web servers is that they are sensitive to overload. The servers may become overloaded during temporary traffic peaks when more requests arrive than the server is designed for. Because overload usually occurs rather seldom, it is not economical to overprovision the servers for these traffic peaks, instead admission control mechanisms can be implemented in the servers. This paper...

DotSlash allows different web sites to form a mutual-aid community, and use spare capacity in the community to relieve web hotspots experienced by any individual site. As a rescue system, DotSlash intervenes when a web site becomes heavily loaded, and is phased out once the workload returns to normal. It aims to complement the existing web server infrastructure to handle short-term load spikes ...

Load balancing of the Web bank servers can be implemented by minimization of the workload of the bottleneck Web server. Load balancing improves both a performance of the system and the safety of the bottleneck computers. An evolutionary algorithm based on a tabu search procedure is discussed for solving multi-criteria optimization problem of finding a set of Pareto-suboptimal task assignments. ...

Load balancing of the Web bank servers can be implemented by minimization of the workload of the bottleneck Web server. Load balancing improves both a performance of the system and the safety of the bottleneck computers. An evolutionary algorithm based on a tabu search procedure is discussed for solving multi-criteria optimization problem of finding a set of Pareto-suboptimal task assignments. ...

This work analyzes web server performance under simulated WAN conditions. The workload simulates many critical network characteristics, such as network delay, bandwidth limit for client connections, and small MTU sizes to dial-up clients. A novel aspect of this study is the examination of the internal behavior of the web server at the network protocol stack and the device driver. Many known ser...