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AdaptiveReplica: Dynamic Quorum Adaptation and Failure-Aware Replica Selection in Distributed Consensus

Sham Satish Thakare

Abstract

In state-machine replication protocols such as Raft, static quorum commitments suffer from tail-latency degradation under asymmetric network faults, straggling peers, and non-uniform round-trip delays. In this paper, we formulate AdaptiveReplica—a failure-domain aware dynamic quorum adaptation mechanism implemented in C++20 (quorumshift). AdaptiveReplica continuously re-weights consensus quorums without violating linearizability invariants or safety thresholds, eliminating tail latency spikes under asymmetric fault injections.

Artifacts & Code

BibTeX

@article{thakare2026adaptivereplica,
  author  = {Thakare, Sham Satish},
  title   = {AdaptiveReplica: Dynamic Quorum Adaptation and Failure-Aware Replica Selection in Distributed Consensus},
  journal = {IEEE Transactions on Artificial Intelligence},
  year    = {2026},
  note    = {Working Paper / Preprint},
  url     = {https://github.com/shamddd/quorumshift}
}