Cache management method of virtual cache channel of software-defined network

Abstract

The invention provides a cache management method of a virtual cache channel of a software-defined network. In convergence architecture of the software-defined network and a content-centric network, acontroller senses network-wide topology and cache information, and performs centralized control and optimization on cache node selection and cache replacement. In the cache management method providedby the invention, the cache spaces of all nodes on a forwarding path are taken into consideration as a whole, thereby providing a basis for the coordinated unification of cache decision strategies andcache replacement strategies. In the method, the controller periodically collects content requests from various nodes in the network, and statistically measures the popularity of the cached contentsof each node, then selects the least important contents, namely the contents with the lowest popularity, in the virtual cache channel according to a cost-based auxiliary cache method for replacement so as to obtain the optimal cache strategy for the channel.

Description

technical field [0001] The invention relates to the field of computer networks, the centralized control and perception of the whole network information of the software-defined network controller under the fusion architecture of the software-defined network and the content-centric network, and particularly relates to joint optimization cache [0002] A virtual cache channel cache management method for software-defined networking based on cache decision-making and cache replacement. Background technique [0003] With the development of the Internet, people's main application requirements for the network have become information acquisition and data transmission, and the original IP-based point-to-point network communication mode can no longer meet people's needs well. Especially with the continuous growth of video services, people have higher and higher requirements for the ability of the network to transmit massive data. The rapid growth of network scale and the continuous in...

AI Technical Summary

Problems solved by technology

[0006] On the one hand, the traditional content-centric network lacks the ability to perceive the entire network and cannot capture the dynamic changes of the network, which will make the cache decision results meaningless; on the other hand, in the integration of content-centric network and software-defined network If the architecture only focuses on the cache decision strategy and does not consider the cache replacement strategy, the result of the last cache decision may be replaced, resulting in a decrease in the cache hit rate and a waste of network resources.

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