Cache method for content identification based on message digests

Abstract

A cache method for content identification based on message digests includes steps of performing hash computation of contents by utilizing MD5 (message digest 5) of the fifth edition of the message digest algorithm, acquiring message digests of the contents and then utilizing the message digests namely the hash values of the contents to identify each independent content in cache so as to substitute for an identification method utilizing uniform resource locator (URL) to identify the contents between original cache proxies, separating content information from the URL and then inquiring and transmitting the contents by the aid of identification. The cache method utilizing cache coordination control strategies based on the identification method separates the content information from the URL, so that cache information quantity of cache space is increased, and cache utilization rate is increased while communication flows among various caches is reduced evidently.

Description

technical field [0001] The invention relates to a caching method for identifying content based on message summaries, and belongs to the technical field of Internet communication. Background technique [0002] In the current content caching system, caching proxies communicate mainly through the Internet Cache Protocol (ICP) to achieve the purpose of cooperative work. When the caching proxy running the ICP protocol finds that the content is not cached locally and needs to download related content, the caching proxy first initiates a query to the caching proxy adjacent to its location on the network topology. If a neighboring caching proxy caches the relevant content, download the relevant content directly from the neighboring caching proxy. Otherwise, the caching proxy requests the source content server to download the relevant content. Queries between caching proxies are identified by the Uniform Resource Locator URL (Uniform Resource Locator) of the requested content. [...

AI Technical Summary

Problems solved by technology

In such a network, if the current content caching system still only uses URL as the content identification method, it is easy to have great limitations.

Because this will cause a large amount of duplicate content to be cached in the cache system, reducing the amount of information in the cache, thereby reducing the utilization of the cache

At the same time, the duplicate content that could not be retransmitted between cache proxies will be retransmitted multiple times because of different URLs, which seriously consumes network bandwidth and reduces query efficiency.

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