Networking

Efficient Reconciliation and Flow Control for Anti-Entropy Protocols

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Executive Summary

The paper shows that anti-entropy protocols can process only a limited rate of updates, and proposes and evaluates a new state reconciliation mechanism as well as a flow control scheme for anti-entropy protocols. Anti-entropy, or gossip, is an attractive way of replicating state that does not have strong consistency requirements. With few limitations, updates spread in expected time that grows logarithmic in the number of participating hosts, even in the face of host failures and message loss. The behavior of update propagation is easily modeled with well-known epidemic analysis techniques. As a result, many distributed applications use gossip to contain various inconsistencies.

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