Content replacement method, system and node in content distribution network

Abstract

The embodiment of the present invention discloses a content replacement method, system, and node in a content distribution network, wherein the method includes: the current node in the CDN receives the content access request sent by the user terminal; the current node queries the content fragment that the user requests to access Whether it is stored in the current node; if it is stored in the current node, send the content fragment that the user requests to access to the user terminal, and update the heat score of the content fragment that the user requests to access in the heat score table; otherwise, if Not stored in the current node, pull the content fragment requested by the user to the upper node and send it to the user terminal, build an index and heat score for the content fragment requested by the user in the heat score table, and update the user request to access The popularity score of content shards in the popularity score table. The embodiment of the present invention can trigger content replacement in the CDN according to the user's access behavior, so that the existing content can meet the user's needs as much as possible, thereby saving storage 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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