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Exactly-once Delivery

Distributed Systems

The Question

Is exactly-once delivery possible and how do you achieve it?

What a Strong Answer Covers

  • at-least-once + idempotency key
  • Kafka mechanism.

Related Questions

  • Consistent Hashing
  • Rate Limiting
  • CDN
  • Load Balancer — L4 vs L7
  • Distributed Transactions — 2PC, Saga

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