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Efficient and Scalable Consistency Maintenance for Heterogeneous Peer-to-Peer Systems
December 2008 (vol. 19 no. 12)
pp. 1695-1708
Zhenyu Li, Institution of Computing Technology, Chinese Academy of Sciences, Beijing
Gaogang Xie, Institution of Computing Technology, Chinese Academy of Sciences, Beijing
Zhongcheng Li, Institution of Computing Technology, Chinese Academy of Sciences, Beijing
Consistency maintenance mechanism is necessary for the emerging Peer-to-Peer applications due to their frequent data updates. Centralized approaches suffer single point of failure, while previous decentralized approaches incur too many duplicate update messages because of locality-ignorant structures. To address this issue, we propose a scalable and efficient consistency maintenance scheme for heterogeneous P2P systems. Our scheme takes the heterogeneity nature into account and forms the replica nodes of a key into a locality-aware hierarchical structure, in which the upper layer is DHT-based and consists of powerful and stable replica nodes, while a replica node at the lower layer attaches to a physically close upper layer node. A d-ary update message propagation tree (UMPT) is dynamically built upon the upper layer for propagating the updated contents. As a result, the tree structure does not need to be maintained all the time, sav-ing a lot of cost. Through theoretical analyses and comprehensive simulations, we examine the efficiency and scalability of this design. The results show that, compared with previous designs, especially locality-ignorant ones, our approach is able to reduce the cost by about 25-67 percent.

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Index Terms:
Distributed Systems, Distributed networks, Performance evaluation of algorithms and systems
Citation:
Zhenyu Li, Gaogang Xie, Zhongcheng Li, "Efficient and Scalable Consistency Maintenance for Heterogeneous Peer-to-Peer Systems," IEEE Transactions on Parallel and Distributed Systems, vol. 19, no. 12, pp. 1695-1708, Dec. 2008, doi:10.1109/TPDS.2008.46
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