Pick the window type

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  • Flow 04

Difficulty 2 of 5

Bill each customer for API calls in each hour. Each call must be in exactly one bill. 20,000 customers send 40,000 calls/s, and the large ones call all day without a pause. The counter has 8 vCPU and 16 GB. Choose the window type.

Play level

Options

  • Tumbling 1-hour windows
  • Sliding 1-hour windows, 1-minute step
  • Session windows, 30-minute gap
Each worker adds one network cardDrag or use arrow keys to change the workers

Goals and limits

p99 latency
under 200 ms
Error rate
under 0.1%
Monthly cost
under 1,000 USD/mo
Traffic
40,000 req/s

Concepts

How players did

Player results load from the server.

All levels