Control-Based Real-Time Metadata Matching for Information Dissemination

Abstract

Real-time information dissemination is of increasing im- portance to our society. Existing work mainly focuses on delivering information from sources to sinks in a timely manner based on established subscriptions, with the as- sumption that those subscriptions are persistent. However, the bottleneck of many real-time information dissemination systems is actually the matching process to continuously reevaluate such subscriptions between numerous sources and numerous sinks, in response to dynamically varying in- formation attributes at runtime. In this paper, we propose a feedback controller to adaptively meet the response time constraints on metadata matching in an example informa- tion dissemination system. Our controller features a rigor- ous design based on well-established feedback control the- ory for guaranteed control accuracy and system stability. Empirical results on a physical test-bed demonstrate that our controller outperforms both an open-loop solution and a typical heuristic solution, by having more accurate con- trol and better system quality of service.