File acquiring method, node servers and system

Abstract

The invention discloses a file acquiring method, node servers and a system. The file acquiring method of the node servers in the content distribution network system includes the steps of acquiring information of one or more hot files from a hot file server, acquiring file location information of at least one hot file of the one or more hot files from a file location server, wherein the file location information indicates information of at least one node server where the hot files are stored, and downloading the hot files from the at least one node server where the hot files are stored and storing the hot files in the node servers according to the file location information of the hot files, wherein the hot files are files with file visiting times larger than pre-determined times.

Description

technical field [0001] The invention relates to the field of computer network technology, in particular to a method for acquiring files of a node server in a content distribution network system, the node server in the content distribution network system, and the content distribution network system. Background technique [0002] CDN (Content Delivery Network) is a layer of intelligent virtual network based on the existing Internet formed by placing node servers throughout the network. The basic idea of ​​CDN is to avoid as far as possible the bottlenecks and links on the Internet that may affect the speed and stability of data transmission, so as to make content transmission faster and more stable. [0003] The CDN system can redirect the user's request to the node server closest to the user based on comprehensive information such as network traffic, connection of each node, load status, distance from the user, and response time in real time. Need content, solve the situatio...

AI Technical Summary

Problems solved by technology

[0006] 2. Occupies a lot of bandwidth resources

Due to the large amount of clone data, a large data bandwidth is required, especially when the source server and the new node server are not in the same IDC (Internet Data Center, Internet Data Center), it will occupy a large amount of valuable bandwidth resources for a long time

[0007] 3. The complexity of data transmission and verification is high

Since the data files to be transmitted are in the order of T and have a relatively complex directory structure, the verification complexity will be very high, and millions of files, when the transmission fails, the retransmission complexity will also be high

[0008] 4. Poor real-time performance

Due to the need to find the data required by the requesting end in T-level data files, the real-time satisfaction is low

[0009] 5. Take up a lot of storage space

The time and network transmission costs will double, and the real-time performance is poor

If you encounter a request to obtain a large file, the real-time performance will be worse, and a large amount of memory will be consumed at the same time, and the hit rate will be lower due to the large file

[0012] 2. Poor stability

When the source site and the local network are poor, the requested file cannot be retrieved and cannot be sent to the requesting end

If the cache is only in memory, the data in the cache cannot be recovered after power failure

[0013] 3. The source site is under high pressure

Since a large number of requests need to be obtained by returning to the source, the data processing pressure of the source site is heavy

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