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AWS SQS FIFO vs Standard Queues for Healthtech Payment Retry Design

Short answer: Use Standard for independently idempotent nightly snapshot jobs; use FIFO only when per-entity ordering or queue deduplication is a real invariant.

  • FIFO queues provide ordered processing within a message group and queue-supported deduplication.
  • Standard queues offer at-least-once delivery and best-effort ordering, suitable for repeatable jobs.

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