Uplink oversubscription

  • Estimate
  • Metal 12
  • Rack

Difficulty 4 of 5

A rack switch has 48 server ports at 25 Gbit/s and 8 uplinks at 100 Gbit/s: 1,200 Gbit/s down, 800 Gbit/s up. In a shuffle, each of the 48 servers sends 256 KiB, and 7 of 8 bytes go to other racks. How many µs until the last byte leaves?

Play level

The question

Answer with one number in µs.

Two power feedsTap to cut feed A. Arrow keys change the power per server.

Goals and limits

Completion time
under 0.2 ms
Monthly cost
under 10,000 USD/mo

Concepts

How players did

Player results load from the server.

All levels