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Consistency Trinity: Flagship Article 2 — Idempotency Keys in Production (Redis, PHP + Node)
The Consistency Trinity: Idempotency Keys, Atomic Transactions, and Write-Ahead Logging The Consistency Trinity: Idempotency Keys, Atomic Transactions, and Write-Ahead Logging By Marcus Vance · Lead Systems & Backend Architect · October 2026 Every production system eventually meets one of three disasters: a payment that was charged twice, a transfer where the money left one account…