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Consensus Latency Tails Under Cross-AZ Raft Deployments : State Divergence and Merge Integrity Under Concurrent Writers

Gohashicorp/raftbadgerPrometheus

Problem Breakdown

The fundamental defect is that shared mutable state is updated by concurrent writers whose operations are only serialized after the fact, at reconciliation time. A 5-node Raft group spread across three availability zones commits at the speed of its slowest quorum route; when one AZ degrades to 40ms RTT while others sit…

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