Abstract:

Due to having many benefits,the emerging P2P is attracting the attentions of industries and academia.Data sharing is one of the P2P application domains.However,the data sharing in current P2P systems is mostly restricted to filesystemlike capabilities, and cannot directly deal with relational data.Furthermore,under some situations,data integration methods in the traditional database cannot be carried on.The mergence of the P2P and the database technology provides a new approach to solving the problem.In this paper, firstly we introduce the backgrounds of the emergence of PDBS (P2P Database System) and its related work.Secondly,we simply review the P2P technology from two aspects:character and overlay network.Thirdly,we analyze the similarities and differences between PDBS and DDBS (Distributed Database System).Finally,we also present a PDBS prototype instance:PeerDB.

Key words: P2P database system;P2P;distributed database system;PeerDB