Uneven work

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Difficulty 2 of 5

A balancer sends 300 requests/s to two backends with 2 vCPU each. Measured CPU per request is 1 ms on one backend and 50 ms on the other. Choose the routing plan. Keep p99 below 350 ms and errors below 0.1 percent.

Play level

Options

  • Send requests in round-robin order
  • Round robin with a 300 ms backend timeout
  • Send requests to the less busy backend
One balancer, many serversDrag or use arrow keys to add or remove servers

Goals and limits

p99 latency
under 350 ms
Error rate
under 0.1%
Monthly cost
under 100 USD/mo
Traffic
300 req/s

Concepts

How players did

Player results load from the server.

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