A Dynamic Failure Detector for P2P Storage System

P2P storage systems have a lot of attractive advantages, such as self-organizing, scalability, robust and fault-tolerant. Unfortunately, there are some problems in real network conditions, especially, when considering asynchronous wide-area networks, where messages may be delayed indefinitely and nodes may fail. So, failure detector is one of basic components to build a reliable P2P storage systems. Considering the highly dynamic characteristics of distributed system, a novel dynamic failure detector, which can combine heartbeat strategy with unbiased grey prediction model, is designed to improve the failure detection quality of service (QoS) according to the application needs and network environment changes. The results show that, on the basis of the algorithm implementation failure detector has better performance. Compared to other failure detector, ours is much efficient and adaptive.