Time-critical event dissemination in geographically distributed clouds

Cloud computing has rapidly become a new infrastructure for organizations to reduce their capital cost in IT investment and to develop planetary-scale distributed applications. One of the fundamental challenges in geographically distributed clouds is to provide efficient algorithms for supporting intercloud data management and dissemination. In this paper, we present Plume, a generic distributed intercloud overlay for time-critical event dissemination services. Plume aims at improving the interoperability of interclouds in time-critical event dissemination services, such as computing policy updating, message sharing, event notifications and so forth. Plume organizes these distributed clouds into a novel quorum ring overlay to support a constant event dissemination latency. Our numerical results show that the proposed Plume greatly improves the efficiency as compared to a DHT-based overlay approach and provides better scalability than the fully-meshed approach.