(d) 70% local traffic
Figure 10. Link load distribution of the 8×8 Mesh-of-Torus network in different flow patterns.
Left column represents the horizontal link; Right column represents the longitudinal link.
The results have shown that when the flow occurs in the internal subnet, the peak value of the central link load in the network will fall down such that the link load in each part of the whole network will be balanced. In addition, Mesh-of-Torus network can satisfy the actual needs since in the real world since majority of the traffic distributions among internal servers are in the rack.
We record load distributions of long link in different rows for our more detailed analysis. And it can be observed from the figure that in an all-to-all model, the long link have a high rate of utilization. That is because that routing algorithm introduced in this network will guide the packets to the edge server before routing to another subnet. But as the flow distributions within the subnet increase, they will be controlled by reducing the utilization rate of long link. Then, the distributions of link load in the whole network will be balanced well. The same situation will exist in the longitudinal link as well.