Identifying and requesting data in network using identifiers which are based on contents of data

  • US 6,415,280 B1
  • Filed: 04/01/1999
  • Issued: 07/02/2002
  • Est. Priority Date: 04/11/1995
  • Status: Expired due to Term
First Claim
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1. In a system in which a set of data files are distributed across a network of servers, at least some of the data files being cached versions of data files from a source server, wherein the source server is distinct from the servers in the network, a content delivery method comprising:

  • determining a data identifier for a particular data file on the source server, the data identifier being determined using a given function of the data, wherein said data used by the given function to determine the data identifier comprises the contents of the particular data file; and

    responsive to a request for the particular data file, the request including at least the data identifier of the particular data file, providing the particular data file from a given one of the servers of the network of servers, said providing being based on the data identifier of the requested data item.

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