Abstract:

The constant degree P2P system has become the P2P domain’s promising hotspot, however, its topologicallyaware problem cannot be resolved by replanting the existing technologies simply. A framework named COFissionE for building topologicallyaware constant degree P2P systems is proposed: the peers are firstly clustered to form the lower level overlay, and at the higher level, a “coincide lower bound” rule is used to construct intercluster links which guarantee efficient intercluster communications and limit the number of intercluster neighbors. The resource publication, query and message routing methods in COFissionE are also provided. The experimental results show that COFissioinE fullfils the  topologicallyaware property with limited overhead and reduces the query cost efficiently. This improvement can be replanted to other constant degree P2P systems with other optimization technologies.

Key words: topologicallyaware；constant degree P2P；hierarchical overlay