Content replacement method, system and node in CDN

Abstract

Embodiments of the present invention disclose a content replacement method, system and node in a CDN (Content Delivery Network), wherein the method comprises: a current node in the CDN receives a content access request sent from a user terminal; the current node queries whether a content fragment requested by the user is stored in the current node; if the content fragment is stored in the current node, the content fragment requested by the user is sent to the user terminal, and a popularity score for the content fragment requested by the user is updated in a popularity score table; otherwise, the content fragment requested by the user is pulled from an upper node and sent to the user terminal, an index and a popularity score for the content fragment requested by the user are established in the popularity score table, and the popularity score for the content fragment requested by the user is updated in the popularity score table. Through the adoption of the embodiments of the present invention, the content replacement in the CDN can be triggered according to the user access behavior so that current existing contents meet user requirements as far as possible, thereby saving the memory and bandwidth resources.

Description

technical field [0001] The invention relates to communication technology, in particular to a content replacement method, system and node in a content distribution network. Background technique [0002] Content Delivery Network (CDN) is to send content (such as video, audio, World Wide Web web pages, etc.) to the nearest user by adding a new network architecture to the existing Internet Protocol (IP) bearer network. The "edge" of the network allows users to obtain the content they need nearby, thereby solving the problem of optimizing network traffic and improving the response speed of users visiting websites. [0003] CDN can solve the problem of slow user access response speed caused by low backbone network bandwidth, large user access volume, and uneven network distribution. CDN contains multiple nodes, but each node cannot store all content. In order to realize that the content stored in each node can meet the needs of users as much as possible, it is first necessary to ...

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventors found that in the existing content replacement methods, the content replacement rate in the least recently used algorithm (Least Recently Used, LRU) and the most recently used algorithm (Most Recently Used, MRU) is too high. Large, the replacement efficiency is very low, frequent content replacement will lead to high data input and output (I / O) of the hard disk, and the data flow pulled from the upper-level node is too large, which will occupy more network bandwidth resources

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