Peer-to-Peer Based QoS Registry Architecture for Web Services

Web service QoS (Quality of Service) is a key factor for users to evaluate and select services. Traditionally, run-time QoS of web services stores in centralized QoS registry, which may have performance and availability problems. In this paper, we propose a P2P (Peer-to-Peer) QoS registry architecture for web services, named Q-Peer. Q-Peer is an unstructured P2P system. Query of QoS is naturally achieved by getting QoS address from corresponding service description. Q-Peer has a replication based mechanism to ensure load-balance of the whole architecture. The architecture takes advantage of P2P systems to ensure its availability, performance and autonomy. We are currently implementing Q-Peer and planning to test it on Planet-Lab.