CDHT: A Clustered DHT Communication Scheme for Serverless (P2P) Networks

Serverless Peer-to-Peer (P2P) networks are becoming more and more influential on the Internet and in the computing world. These P2P systems have many advantages over their client-server counterparts, such as high availability, low maintenance cost and fault tolerance. They also make it possible to harness massive idle computing and storage resources at the edges of the Net. Two P2P models have emerged to achieve these benefits: the unstructured model and the structured model. The unstructured model typically forwards a query message to a selected number of nodes based on local knowledge. The structured P2P model is known as the Distributed Hash Table (DHT). In DHT networks, nodes and content/files are associated with a hash key as nodeId or contentId/fileId, respectively. The query message is routed through the overlay network to the node responsible for that key. Both the structured and the unstructured model have strengths and weaknesses. The structured model is favoured in research but not in real applications. It’s argued that the unstructured model is more suitable for the real world. It’s rather difficult to determin