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The LCU Trap: Why Your Load Balancer Bill Has Nothing To Do With Bandwidth

` Most engineers assume load balancer costs scale with throughput: "We push 2 Gbps, so our bill should reflect 2 Gbps." That intuition is wrong. AWS doesn't bill ALB or NLB by throughput.

  • Load balancer costs based on Load Balancer Capacity Units (LCU), not bandwidth.
  • Optimizing non-LCU factors has no impact on load balancer bill.

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