CDN cache clearing method and system

Abstract

The invention relates to a CDN cache clearing method and system. The system comprises a data processor, a communication interface module, a memory and a communication bus, wherein mutual communicationamong the data processor, a communication interface and the memory is completed through the communication bus. By means of the method, the time when a certain file is obtained from a source webpage for the first time can be recorded by all nodes in CDN; the time when a file is cleared for the last time is recorded in meta data of a cached file, the time represents the time when a certain file iscleared for the last time, when a refreshing task is distributed by a center, the time of the current clearing task is uniformly marked, and after the clearing time is received by machines of nodes ofeach level, the clearing time is stored in the meta data; through a certain file, a uniform clearing time is recorded by the whole network. The method and the system have the advantages of being highin refreshing efficiency, real-time refreshing can be conducted on the whole network, the refreshing time is shorter, and the system is easy to maintain.

Description

technical field [0001] The invention belongs to the field of information technology, and in particular relates to a CDN cache clearing method and system. Background technique [0002] In distributed systems such as CDN, content is stored in CDN nodes through a cache mechanism, and users obtain data through CDN nodes. Because the CDN node is cached, there may be data inconsistencies between the CDN node and the origin site. In actual business, we often encounter the function of clearing the specified file cache in the CDN to achieve complete data synchronization between the CDN and the origin site. Because the CDN system stores a large number of nodes in the entire network, and each node has a hierarchical relationship such as edge-parent layer-super parent layer, etc. It is to return to the parent layer, the parent layer returns to the super parent layer, and the super parent layer returns to the customer's real origin site. The levels and nodes passed by different domain...

AI Technical Summary

Problems solved by technology

Disadvantages of the traditional solution: 1. The refresh efficiency is low, the parent layer and edges cannot be cleared concurrently, and the overall clearing time becomes longer

2. Refreshing the system needs to maintain the relationship of each level, and the implementation is more complicated

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