Breakpoint

Built-in stress tests

Every design is graded by surviving one of these. Pick a scenario inside the workspace.

• Black Friday

  Checkout traffic ramps through the morning, then a lightning-deal spike.

  5,000 RPS base · 60s · 90% reads

  Target: p95 ≤ 250ms · errors ≤ 1%

  • at 10s — ramp to 20000 RPS over 20s
  • at 45s — spike ×1.5 for 10s

• Celebrity Tweet

  A megastar tweets: reads stampede a single hot key while retweets spike the fanout.

  15,000 RPS base · 60s · 95% reads

  Target: p95 ≤ 200ms · errors ≤ 2%

  • at 10s — hotkey skew 0.5 for 40s
  • at 25s — spike ×3 for 15s

• AZ Outage

  An availability zone drops: part of the app fleet dies and the link to the database partitions.

  12,000 RPS base · 60s · 80% reads

  Target: p95 ≤ 300ms · errors ≤ 5%

  • at 15s — kill 2 × app_server
  • at 15s — partition db_sql for 20s