Criso: An Incremental Scalable and Cost-Effective Data Center Interconnection by Using 2-Port Servers and low-end Switches

Abstract

With the data growing explosively, data center networks (DCN) have to possess the characteristics of incrementally scalable, cost-efficient, high network capacity and fault tolerance. However, the widely used DCNs can not meet the demands above. In this paper, we propose a new type of data center topology named Criso to settle the challenges. Different from the existed works, Criso has the advantages of both switch-centric topologies (servers do not participate in routing) and the server-centric topologies (the scalability is not limited by the ports of switches). It is constructed based on pods, The internal structure of each pod is the same and there are only four external interfaces. By applying such structure, a pod-based and fault-tolerant routing algorithm is designed to handle multiple types of failures. Criso is hierarchically, recursively defined and high-network capacity which can scale up to millions of nodes. The analysis results demonstrate that the Criso model is significantly superior to four state-of-the-art data center structures in terms of the network capacity, scalability, cost, power consumption and other static characteristics. Criso achieves the target of low-cost, low-energy consumption and highly-scalability simultaneously.