Evaluating and Adapting Distributed Realtime Embedded Publish & Subscribe Middleware in Dynamic Environments to Support Quality of Service

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Quality-of-service (QoS)-enabled publish/subscribe (pub/sub) middleware provides powerful support for scalable data dissemination. It is hard, however, to maintain key quality of service properties (such as reliability and latency) in flexible environments (e.g., cloud computing infrastructure) and operating environments that change over time for distributed real-time and embedded (DRE) systems (such as disaster relief operations or power grids). Managing quality of service manually is often not feasible in these flexible and dynamic environments due to slow response times, the complexity of managing multiple interrelated quality of service settings, and the scale of the systems being managed. For certain domains, DRE systems must be able to reflect on the conditions of their environment and adapt accordingly in a bounded amount of time.