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Content consistency in a data access network system

  • US 7,349,902 B1
  • Filed: 08/04/1999
  • Issued: 03/25/2008
  • Est. Priority Date: 08/04/1999
  • Status: Expired due to Fees
First Claim
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1. In a data access network system that includes a content server coupled to a plurality of proxy servers via an interconnect network, a system of maintaining content consistency between the content server and proxy servers, comprising:

  • a subscription manager in the content server for specifying all of the proxy servers that are subscribed to a content file stored in the content server, wherein the subscription manager generates a subscription list that specifies all of the subscribed proxy servers that cache the content file when the subscription manager is notified by each of the proxy servers that it has cached the content file; and

    a consistency manager also in the content server for notifying all of so subscribed proxy servers that cache the content file when the content file is updated in the content server to discard the cached content file from those proxy servers.

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