When does a write commit in Raft?
A leader appends a write to its log and replicates it to followers. The entry commits only when replicated to a quorum (majority). Committed entries are durably written and will survive failures; clients see successful confirmation only after commitment.
Answered in
Why Raft Consensus Prevents Split-BrainRaft ensures only one partition can reach quorum, making split-brain impossible. Writes commit to majorities. Powers etcd and CockroachDB.
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