7 With the explosive use of Internet, contemporary web servers are susceptible to overloads during which their services 8 deteriorate drastically and often lead to denial of services. Overloads are of more serious concerns for QoS-aware 9 servers. Evaluation of performance of QoS-aware servers in terms of the number of request completion is not very 10 meaningful. A better measure would be the ...

Nowadays, big companies such as Google, Microsoft, which have adequate proxy servers, have perfectly implemented their web crawlers for a certain website in parallel. But due to lack of expensive proxy servers, it is still a puzzle for researchers to crawl large amounts of information from a single website in parallel. In this case, it is a good choice for researchers to use free public proxy s...

Enterprises continue to move their technologies and services onto the Web. Today, the Web servers that provide these services are distributed across multiple systems. As the number of Web applications increases, it is very common for the number of physical systems in the data center hosting these Web applications to increase along with them. Studies from IDC, among others, describe the challeng...

<p class="Abstract">Web server those who use apache are now very familiar to users, because is easier than other web servers, but runs PHP applications (Hypertext Preprocessor) by handling 100000 requests certainly influential on the speed of server. Openlitespeed a that functions same as apache, users more likely openlitespeed. This study conducted performance test both servers find out ...

The Bioinformatics Links Directory, http://bioinformatics.ca/links_directory/, is an online resource for public access to all of the life science research web servers published in this and previous issues of Nucleic Acids Research, together with other useful tools, databases and resources for bioinformatics and molecular biology research. Dependent on community input and development, the Bioinf...

While traditional Internet servers mainly served static and later also dynamic content, the popularity of Web services is increasing rapidly. Web services incorporate additional overhead compared to traditional web interaction. This overhead increases the demand on Internet servers which is of particular importance when the request rate to the server is high. We conduct experiments that show th...

W eb caching is widely viewed as an effective way to improve Internet performance. Web cache servers temporarily store Web documents. Because cache servers are typically located near the clients, using them reduces retrieval latencies and the number of requests reaching Web servers, thus reducing overall network activity. Most Web cache servers make cache decisions based on document names or UR...

Popular Web sites cannot rely on a single powerful server nor on independent mirrored-servers to support ever increasing request load. Scalability and availability can be provided by distributed Web-server architectures that distribute client requests among the multiple servers in a user-transparent way. In this paper we will review the state of the art in distributed Web-server systems. We wil...

On the Internet, web servers are often the main interface between companies or individuals and the rest of the world. As a result they represent valuable targets for attackers. Although several types of attacks are possible against web server we focus in this paper on flooding based denial of service attacks. We explore the detection of saturation attacks against web servers as well as the prec...