Building a reliable P2P system out of unreliable P2P clients: the case of KAD
CoNEXT '07 Proceedings of the 2007 ACM CoNEXT conference
Availability in Peer to Peer Management Networks
APNOMS '08 Proceedings of the 11th Asia-Pacific Symposium on Network Operations and Management: Challenges for Next Generation Network Operations and Service Management
Residual-based estimation of peer and link lifetimes in P2P networks
IEEE/ACM Transactions on Networking (TON)
Towards a more accurate availability evaluation in peer-to-peer storage systems
International Journal of High Performance Computing and Networking
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The availability of a P2P service is a function of the individual peers驴 availabilities, and it is often desirable to estimate how available a particular P2P service will be given the availability of its peers. Prior work in this area has widely used the fraction of time the average peer is available as the basis for this estimate. We show here that this approach has serious drawbacks. We develop a different measure, which we call presence-based availability, which takes into account the availability of the individual peers. Using traces of live P2P systems taken from the literature, we demonstrate that presence-based availability is a more reliable indicator of potential performance than prior methods. We show that our metrics successfully estimate the availability of a P2P file-sharing system. Then, using presence-based measures to make a better estimate of a parameter in a highly-available system, we achieve a 75% decrease in resource usage relative to an existing technique relying on traditional metrics.