CDHT: the design of a clustered DHT routing scheme for serverless (P2P) networks

Avoiding hot spots and handling dynamic network environments are the inherent weaknesses of the DHT-based (dynamic hash table) p2p networks. The solution lies in isolating the DHT overlay from the network uncertainty and seeking an efficient and complementary lookup pattern outside the DHT. We present the design of a hybrid-overlay architecture for p2p networks in this paper that forms the DHT overlay based on the serverless layer clusters. The architecture delegates the handling of the network uncertainty to the network-aware serverless Layer; thus a more reliable network and content structure is constructed as the foundation of the DHT overlay. In addition, a new heuristic approach to content location is made possible to exploit network proximity and content popularity to balance network traffic and to improve the lookup efficiency for popular content.