Tail at scale

  • Estimate
  • Level 35 of 41
  • Scale

Difficulty 1 of 5

A request waits for all 100 shards. Each shard independently has a 1 percent chance of being slow. What percent of requests wait for at least one slow shard?

Play level

The question

Answer with one number in percent.

A page waits for its slowest callDrag or use arrow keys to change the calls per page

Goals and limits

p99 latency
under 200 ms
Monthly cost
under 100 USD/mo
Traffic
100 req/s

Concepts

How players did

Player results load from the server.

All levels