Contacts

The performance of a system, i.e., its quality-of-service properties with respect to timeliness and resource utilization, are considerably influenced by the workload the system is exposed to. Hence, a representative workload model—including the workload type (open/closed) and properties like arrival rates, think times, navigational patterns, etc.—is a prerequisite for accurate measurement-based and model-based performance evaluation. If a system is already in production use, workload models can be obtained from monitored production workloads. The goal of this seminar paper is to provide a survey of approaches for obtaining workload models from enterprise systems in production, including a description of metrics that allow to evaluate the quality of the obtained models. As a practical part of this seminar, it is expected that selected techniques are evaluated by the student based on proof-of-concept implementations and/or small experiments. The provided references are to be considered a starting point and it is expected to extend the literature search and present a coheren