Challenges

Exactly-once streams

Ad click aggregator

DifficultyStages: 0 / 5
  1. Ingest 1M clicks/s
  2. Hot ad counters
  3. Wait for late events
  4. Exactly-once writes
  5. Advertiser dashboards
  6. Final test

Ingest 1M clicks/s, count them per minute on hot ads, wait for late events, write each settlement exactly once, and serve the totals to advertisers.

Final testThe first consumer fails for 5 s and the settlement writer for 12 s, while clicks rise x1.3. Your final board runs once more with a new traffic seed.

The system, stage by stageTap, drag or use arrow keys to step through the stages

Stage 5 of 5 · 11 parts given · 60,028 requests/s

Partner apps 1Stream processor 1

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