The role of experimentation in software engineering: past, current, and future
Proceedings of the 18th international conference on Software engineering
Internet Web servers: workload characterization and performance implications
IEEE/ACM Transactions on Networking (TON)
Self-similarity in World Wide Web traffic: evidence and possible causes
IEEE/ACM Transactions on Networking (TON)
Generating representative Web workloads for network and server performance evaluation
SIGMETRICS '98/PERFORMANCE '98 Proceedings of the 1998 ACM SIGMETRICS joint international conference on Measurement and modeling of computer systems
Evaluating software eng. methods and tools part 10: designing and running a quantitative case study
ACM SIGSOFT Software Engineering Notes
Experimentation in software engineering: an introduction
Experimentation in software engineering: an introduction
A methodology for workload characterization of E-commerce sites
Proceedings of the 1st ACM conference on Electronic commerce
What is actually taking place on web sites: e-commerce lessons from web server logs
Proceedings of the 2nd ACM conference on Electronic commerce
In search of invariants for e-business workloads
Proceedings of the 2nd ACM conference on Electronic commerce
Business-oriented resource management policies for e-commerce servers
Performance Evaluation - Special issue on internet performance modelling
Characterizing the scalability of a large web-based shopping system
ACM Transactions on Internet Technology (TOIT)
Measuring and Modeling Usage and Reliability for Statistical Web Testing
IEEE Transactions on Software Engineering - Special section on the seventh international software metrics symposium
Architecture and Dependability of Large-Scale Internet Services
IEEE Internet Computing
Reliability Assessment of WEB Applications
COMPSAC '02 Proceedings of the 26th International Computer Software and Applications Conference on Prolonging Software Life: Development and Redevelopment
End-to-End Performance of Web Services
Performance Evaluation of Complex Systems: Techniques and Tools, Performance 2002, Tutorial Lectures
Explaining World Wide Web Traffic Self-Similarity
Explaining World Wide Web Traffic Self-Similarity
User-Oriented Reliability Modeling for a Web System
ISSRE '03 Proceedings of the 14th International Symposium on Software Reliability Engineering
Assessing Uncertainty in Reliability of Component-Based Software Systems
ISSRE '03 Proceedings of the 14th International Symposium on Software Reliability Engineering
Empirical Study of Session-Based Workload and Reliability for Web Servers
ISSRE '04 Proceedings of the 15th International Symposium on Software Reliability Engineering
Empirical Software Engineering
Empirical observations on the session timeout threshold
Information Processing and Management: an International Journal
Web software traffic characteristics and failure prediction model selection
Journal of Computational Methods in Sciences and Engineering
International Journal of Business Intelligence and Data Mining
Investigating the distributional property of the session workload
Journal of Web Engineering
Information Processing and Management: an International Journal
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The growing availability of Internet access has led to significant increase in the use of World Wide Web. If we are to design dependable Web---based systems that deal effectively with the increasing number of clients and highly variable workload, it is important to be able to describe the Web workload and errors accurately. In this paper we focus on the detailed empirical analysis of the session---based workload and reliability based on the data extracted from actual Web logs of eleven Web servers. First, we introduce and rigourously analyze several intra---session and inter---session metrics that collectively describe Web workload in terms of user sessions. Then, we analyze Web error characteristics and estimate the request---based and session---based reliability of Web servers. Finally, we identify the invariants of the Web workload and reliability that apply through all data sets considered. The results presented in this paper show that session---based workload and reliability are better indicators of the users perception of the Web quality than the request---based metrics.