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Method and system for tiered distribution in a content delivery network

  • US 20030233423A1
  • Filed: 04/09/2002
  • Published: 12/18/2003
  • Est. Priority Date: 04/09/2002
  • Status: Active Grant
First Claim
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1. A method operative in a content delivery network (CDN) having a set of surrogate origin servers organized into regions and that provide content delivery on behalf of participating content providers, wherein a given content provider operates an origin server, comprising:

  • establishing a cache hierarchy in the CDN comprising a given surrogate origin server region and either (a) a single parent region located in a given location, or (b) a subset of parent regions located in given core Internet locations;

    in response to a determination that a given object request cannot be serviced in the given surrogate origin server region, directing the given object request to the single parent region or to a given one of the subset of parent regions, based on metadata associated with the given object request, instead of to an origin server; and

    attempting to service the given object request from a given server in the single parent region or the given one of the subset of parent regions.

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