Uplink oversubscription

Metal 12

Estimate

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?

10 ns100 ns1 µs10 µs100 µs1 ms10 ms100 ms1 s10 s

Type a number or drag the scale. Each mark is 10 times the mark before it.

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