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The k-set agreement problem is a generalization of the consensus problem. Namely, assuming that each process proposes a value, every non-faulty process must decide one of the proposed values, under the constraint that at most k different values are decided. This is a hard problem in the sense that it cannot be solved in a pure read/write asynchronous system, in which k or more processes may crash...
Generalized Paxos (GPaxos) is a recent solution to Generalized Consensus, a distributed problem to which several key agreement problems reduce. We envision that GPaxos may unify within a single and novel Agreement-as-a-Service infrastructure to multiple distributed protocols. To date this potential is however not fully unleashed, due to the steep learning curve of the protocol and the high complexity...
Consensus (agreeing on a sequence of commands) is central to the operation and performance of distributed systems. A well-known solution to consensus is Fast Paxos. In a recent paper, Lamport enhances Fast Paxos by leveraging the commutativity of concurrent commands. The new primitive, called Generalized Paxos, reduces the collision rate, and thus the latency of Fast Paxos. However if a collision...
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