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Structured DHTs offer many desirable properties for a large class of applications, including self-organization, failure resilience, high scalability, and a worst-case performance bound. However, their O(log N) hop average-case performance has prohibited them from serving latency-sensitive applications.

In this paper, we outline a framework for proactive replication that offers O(1) DHT lookup performance for a frequently encountered class of query distributions. At the core of this framework is an analytical model that yields the optimal object replication required to achieve constant time lookups. Beehive achieves high performance by decoupling lookup performance from the size of the network. It adapts quickly to flash crowds, detects changes in the global query distribution and self-adjusts to retain its performance guarantees. Overall, Beehive enables DHTs to be used for serving latency-sensitive applications. 2004-02-11