使用Gossip算法实现可靠的基于内容的发布订阅系统

分布式基于内容的发布订阅系统正受到日益广泛的重视，然而大多数研究都忽略了可靠性保证，这限制了该系统在动态和不可靠场合下的应用．本文首先介绍了基于内容的发布订阅系统和gossip算法，然后提出了一个轻量级的称为PReliability的协议，它通过引入gossip算法保证事件传输的可靠性．仿真实验表明该协议适合于大规模、可靠性低的环境，具有很强的扩展性和健壮性，并且具有简单、易于实现的优势．

Using Gossip Algorithm for Reliable Content-Based Publish-Subscribe Systems

Distributed content-based publish-subscribe systems are receiving increasing attention in the academic field. Nevertheless, almost all of researches have ignored reliability guarantee, which limits its application in the dynamic and unreliable scenarios. This paper first introduces the concept of content-based publish-subscribe system and the idea of gossip algorithm, then presents a lightweight gossip-based protocol called Preliability which provides probabilistic reliability to publish-subscribe systems. Simulation experiments show that the protocol improves significantly event delivery and is very scalable.