由於近年來雲端運算的到來出現許多應用，這些應用常常需要結合多台伺服器來完成搜尋或是平行運算，導致資料中心內部的流量由 80% 伺服器對資料中心外部的流量變成70% 資料中心內部的伺服器間的流量。導致資料中心往光通訊發展，以往所提出的光資料中心架構通常有一個高成本的控制器來收集流量資訊並改變拓樸達到最大的吞吐量。我們提出一個以正方體(cube) 為基礎的網路拓樸，稱為CB，此拓樸會規律的改變且不需要控制器來收集流量資訊並改變拓樸就會有高吞吐量。並且使用Matlab 這套軟體來評估我們與其他方法的效能。

Due to the development of cloud computing, there are many applications for searching, parallel computing, etc, which requires a large number of servers and results in high traffic volume between servers. To satisfy the huge
traffic volume, previous approaches usually require a high-cost controller to collect the traffic demand from top of racks, and using traffic demand to determine
a new topology with highest throughput. In this paper, we propose the cube-baesd topology called CB. CB can change regularly and doesn’t need a high cost controller to collect traffic information. According to the simulation
results, CB has outperforms in terms of throughput compared to previous approaches.

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