Method and device for avoiding repeated storage of content in distributed cache cooperation

A distributed cache and distributed hash technology, applied to electrical components, transmission systems, etc., can solve problems such as difficult identification and low cache utilization

Active Publication Date: 2015-09-09
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the current content is identified by URL in the cache, and the same content will be identified by different URLs at different content providers, making i...

Method used

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  • Method and device for avoiding repeated storage of content in distributed cache cooperation
  • Method and device for avoiding repeated storage of content in distributed cache cooperation
  • Method and device for avoiding repeated storage of content in distributed cache cooperation

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Embodiment Construction

[0056] This embodiment discloses a method for avoiding duplicate storage of content based on distributed cache collaboration, including the following steps:

[0057] S101. Use a binary identification method of provider-dependent identification and provider-independent identification to identify the content. Wherein, the provider-dependent identifier means that the identifier of the content is related to the provider, so the same content data block may have different identifiers in different content providers, such as URL identifiers; the independent identifier of the provider refers to the identifier of the content It has nothing to do with the provider, so the same content data block has the same content identification. For example, existing hash algorithms such as MD2, MD4, MD5 and SHA-1 can be used to perform hash operations on content data blocks, and the obtained hash summary Can be independently identified as a provider.

[0058] S102. Establish a two-level logical mapp...

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Abstract

The invention discloses a method for avoiding repeated storage of content in distributed cache cooperation. The method comprises the steps as follows: using a binary identifying method to perform binary identification on content data blocks; establishing two-level logic mapping tables based on the binary identification of the content data blocks to organize caching content, and performing cache cooperation on the caching content based on distributed Hash operation; receiving a request for a certain content data block from the external by an edge content router, forwarding the request to an internal node which is in charge of storing the content via two-stage routing, transmitting the data block with the node which is in charge of the corresponding content data block to the edge content router, and updating cache replacement control state information of corresponding items of the two-level mapping tables; and receiving a certain data block from the external by the edge content router, forwarding the data block to an internal node which is in charge of storing the content through two-stage routing, and establishing corresponding two-level mapping relationships in the routing forwarding process.. The method of the invention could avoid repeated storage of the content, thereby reducing network flow and improving user experience.

Description

technical field [0001] The present invention relates to the technical field of network storage and content distribution, in particular to a method and device for avoiding duplicate storage of content in distributed cache collaboration. Background technique [0002] At present, users' access to the Internet has changed from point-to-point communication to content acquisition. The traditional TCP / IP network only transmits content, but does not perceive content, resulting in a large amount of redundant traffic transmission on the network. In order to solve the content explosion caused by content acquisition, whether it is the current Internet or the future network proposed by the research community, caching is used as a basic means to satisfy users' asynchronous access to content with heavy tail characteristics. For example, transparent Web Cach adopted by the Internet, PPCache in P2P content distribution network, content cache in CDN, and information / content-centric network N...

Claims

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Application Information

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IPC IPC(8): H04L29/08
Inventor 张国强
Owner NANJING NORMAL UNIVERSITY
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