Algebraic and Topological Structure of QOS (End to End) Within Large Scale Distributed Information Systems

摘要

End-to-end quality of service (QoSete) in large scale distributed information systems (DIS) is essential for intelligent system acquisition and design. The QoSete model formalizes the identification of user requirements and provides performance metrics that are based on empirically measurable attributes that indicate how well user requirements have been met. These performance metrics manifest through the Benefit Function, which is then used for resource dimensioning. The current barriers to achieving QoSete include a lack of understanding of user requirements, the lack of a practical interface between the users and system designers, the lack of a common framework for integration of concepts between the various areas of expertise within the system, and the lack of a mature composability theory that allows such systems to be designed in a modular sense. This work addresses to some degree (primarily at a high-level) each of these obstacles, as well as providing insight into a number of related issues.