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Many distributed hash tables (DHTs) resolve lookups in O(\log n) hops, where n is the number of nodes. One-hop DHTs give lower lookup latencies and lower lookup failure rates. However, it is hard to maintain large, wide-area one-hop topologies. We contribute aecast, a new topology dissemination algorithm for one-hop DHTs. It avoids expensive repair mechanisms and critical points of failure in existing...
Self-organizing overlays based on distributed hash tables (DHTs) are set to make Internet applications more robust. They can improve system dependability, evolve smoothly from small configurations, and scale to massive configurations. Application case studies are presented to illustrate weaknesses of current architectures and to show how overlays can improve robustness-cost tradeoffs. The case studies...
Algorithms by which peers join and leave structured overlay networks can be classified as passive or active. Passive topology maintenance relies on periodic background repair of neighbor pointers. When a node passively leaves the overlay, subsequent lookups may fail silently. Active maintenance has been proven only for fault-free networks. We develop an active topology maintenance algorithm for practical,...
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