Interest in distributed storage is fueled by demand for reliability and resilience combined with decreasing hardware costs. Peer-to-peer storage networks based on distributed hash tables are an attractive solution due to their efficient use of resources and resulting performance. The placement and location of replicas in such systems remain open problems, especially in view of dynamic needs and the requirement to update replicated content. We present and evaluate a novel and versatile technique, replica enumeration, which allows for controlled replication and replica access. The possibility of enumerating and addressing individual replicas allows dynamic updates as well as superior performance without burdening the network with state information, yet taking advantage of locality information when available. We simulate, analyze and prove properties of the system, compare it with related work according to replica management classification criteria we introduce, and discuss some applications.
By: Marcel Waldvogel, Paul Hurley and Daniel Bauer
Published in: RZ3502 in 2003
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