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All Modules System Design Interview Fundamentals Back-of-the-Envelope Estimation

Back-of-the-Envelope Estimation

QPS, storage, bandwidth, cache memory, server counts, powers of two, and sanity-checking your numbers.

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0/7 solved
Question Tags Difficulty Success
1. Eight PM Problem
peak-vs-averagecapacity-planning +1
 Medium 67%
2. Four Point Seven Million
capacity-estimationqps +1
 Medium 60%
3. Ten Gigabits Of Nothing
capacity-estimationunits +2
 Medium 50%
4. Forgot The Third Copy
capacity-estimationstorage +1
 Medium 63%
5. Count The Boxes
capacity-planningserver-count +1
 Medium 83%
6. Twenty Thousand A Month
capacity-estimationcost +2
 Medium 57%
7. In Flight At Once
littles-lawconcurrency +1
 Hard 50%

Learning Resources

System Design Primer, back-of-the-envelope calculations

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