{CodeRoyale}
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Multiple ChoiceIntermediate 45s

Capacity estimation: peak vs average

You size a system for 10M daily active users each making 20 read requests/day. Why must you size for peak, not average QPS?
Options
  1. 1Traffic concentrates in peaks (often 5-10x the average); provisioning for the mean causes overload and cascading failure during spikes
  2. 2Average QPS is impossible to compute reliably because the request rate varies far too much to be meaningfully averaged
  3. 3Peak QPS is always exactly 2x the average, so it can always be derived directly from the daily request total
  4. 4Storage is the only resource that matters, so CPU and network can both be safely sized from the daily average
system-designcapacity-estimation

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