A compliance archive keeps 40 TB of rarely-accessed data in S3 Standard — paying hot-storage prices for cold data — behind an oversized, always-on app server.
Targets (relaxed): p99 ≤ 300 ms, 99.0% availability, standard durability, under $400/mo.
All challenges
Tiered storage lifecycle
beginnerScenario & brief
500 rps peakp99 ≤ 300ms99% availdurability: standardbudget $400/mo
App Server
Compute
2instances
System health
Overheating · burning cash
25
/ 100
Score
Meets SLA but over budget
Monthly cost
$2,063
Budget $400/mo · $1,663 over
Metrics
Capacity100
Availability100
Durability100
Cost efficiency0
Requirements
- Peak capacity — 13000 rps compute · 0 rps db (need ≥ 500 rps)
- p99 latency — ~67 ms (need ≤ 300 ms)
- Availability — 99.50% (need ≥ 99.00%)
- Durability — protected (need backups)
- Budget — $2063/mo (need ≤ $400/mo)
Advisor
- Design is sound but $2063/mo blows the $400/mo budget — right-size to cut cost.
- Compute capacity is more than 2× peak demand — downsize the class or switch to autoscaling to stop overpaying.
Discussion
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For learning purposes only. Costs and capacities are illustrative, not live AWS prices. Not affiliated with or endorsed by Amazon Web Services.