...
- Size is defined by a factor * k* k, the number of ports per identical switch in the network
- 3-level heirarchy:
- core level ((k/2)^2 switches)
- pod level (k pods)
- each pod has 2 internal layers with (k/2 switches/layer => k switches/pod)
- end host level (k^3/3 total hosts)
k
# hosts
# switches
- *# ports
host:switch ratio
host:port ratio
4
16
20
80
0.8
0.2
8
128
80
640
1.6
0.2
16
1,024
320
5,120
3.2
0.2
32
8,192
1,280
40,960
6.4
0.2
48
27,648
2,880
138,240
9.6
0.2
64
65,536
5,120
327,680
12.8
0.2
96
221,184
11,520
1,105,920
19.2
0.2
128
524,288
20,480
2,621,440
25.6
0.2