Sven Graupner

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Grid computing has relied on " best effort " as the guiding principal of operation. However, commercial grids need to provide much stricter guarantees. These guarantees have to be specified in terms of service level agreements and have to be monitored and assured. We propose an architecture for specifying and monitoring service level agreements to achieve(More)
Peer-to-peer computing (P2P) draws growing interest as a new distributed computing paradigm for its potential to harness " edge " computers (e.g., PCs) and make their under-utilized resources available to each other. P2P based e-commerce on the Internet is of particular interest because of P2P's cost effectiveness and redundancy-induced dependability.(More)
The paper discusses a framework and advanced technologies enabling the quantitative analysis, organization and optimization of large-scale, globally distributed enterprise and e-service systems. The goal is to organize complex systems in such ways that traffic at application and service layers can be better explained, predicted and controlled. In(More)
Best-practice frameworks provide guidance for organizing work in business. They enable reuse of experience within a domain. However, best practice frameworks are general and usually cover broad domains. Their guidance thus is often offered at an abstract level rather than as details of actionable tasks and processes to accomplish work. This paper presents(More)
Utility computing is envisioned as the future of enterprise IT environments. Achieving utility computing is a daunting task, because enterprise users have diverse and complex needs. In this paper we describe Quartermaster, an integrated set of tools that addresses some of these needs. Quartermaster supports the entire lifecycle of computing tasks-including(More)
An automated service demand–supply control system can improve a large-scale grid infrastructure comprising a federation of distributed utility data centers. T he growing complexity of large-scale systems raises concerns about their effectiveness and man-ageability. New approaches to system design, use, and management address these concerns through the(More)
— We target the problem of predicting resource usage in situations where the modeling data is scarce, non-stationary, or expensive to obtain. This scenario occurs frequently in computing systems and networks, mostly due to the high dynamicity of the underlying processes. Utility computing environments are an important example for such a scenario, as their(More)