Data center network system and data communication method based on software definition

Abstract

The invention provides a data center network system and data communication method based on software definition and relates to the technical field of cloud calculating data centers. The data center network system structurally comprises a core electric switch, an optical router, a top-of-rack switch, servers, a control module, an optical carrier wave distribution unit and a multi-wavelength light source subsystem. In data communication, communication optical carrier waves are allocated according to the address of the destination server of data and the traffic of the data; the data are sent to the top-of-rack switch after being packaged by the source server; the control module determines and selects an electric switching path or an optical routing path to forward the data according to the address of the destination server and the traffic characteristics of the data information and the corresponding routing algorithm. The top-of-rack switch performs light modulation on the data according to instructions of the control module and forwards the data to the corresponding electric switching or optical routing path. The data center network system and data communication method based on software definition have very good energy saving effect, are low in construction cost and improve the management efficiency of a data center network and the performance of the network.

Description

technical field [0001] The invention relates to the technical field of cloud computing data centers, in particular to a data center network system and a data communication method. Background technique [0002] Cloud computing is a computing model that uses the Internet to access shared resource pools anytime, anywhere, on-demand, and conveniently. Such resource pools include servers, network resources, storage resources, and applications. The data center is the core platform and infrastructure of cloud computing, and the data center network (DCN) is a network that interconnects large-scale servers in the data center to realize large-scale distributed computing, and realizes the transmission and communication of massive data between servers in the data center. There are currently a variety of data center network structures, typical representative structures are Fat-tree (improved electrical switching data center network), Helios (hybrid optical circuit switching and electrica...

AI Technical Summary

Problems solved by technology

The Fat-tree structure improves network reliability to a certain extent, but there are many design defects: 1) Poor scalability, as the number of switches increases, the internal wiring of the network is particularly complicated

2) Core switch bottleneck, the core switch is the bottleneck of bandwidth and performance

3) Excessive energy consumption, energy consumption is one of the key issues that data center operators cannot ignore

However, the Helios structure also has some shortcomings: 1) The delay is large, and the optical circuit switch is used in optical switching, that is, the switch based on the micro-electromechanical system (MEMS). When the traffic matrix changes, the reconstruction process of the optical circuit switch is very time-consuming , usually tens of milliseconds, resulting in a relatively long network delay

2) High energy consumption

The OSA network structure can realize coarse-grained flexible bandwidth and improve network throughput, but there are also shortcomings: 1) The delay is large. This structure uses MEMS switches for signal exchange, and its reconstruction time generally takes tens of milliseconds, so this structure cannot cope Applications with rapid traffic fluctuations

2) It is not easy to handle burst traffic. Compared with packet switching, optical circuit switching does not support burst traffic well.

[0006] To sum up, the existing data center network structure is difficult to meet the bandwidth, delay and energy consumption requirements of future cloud computing data processing and transmission, which has become the bottleneck of modern cloud computing data centers

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