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Methods and apparatus for efficient caching in a distributed environment

  • US 5,864,837 A
  • Filed: 06/12/1996
  • Issued: 01/26/1999
  • Est. Priority Date: 06/12/1996
  • Status: Expired due to Term
First Claim
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1. A method for use in a distributed computing system in which a client worksite requests an updated data object from a remote server having access to the latest version of said object, comprising the steps of:

  • a. generating at the client worksite a first unique number which is indicative of the content of an object previously stored at the client worksite;

    b. generating at the client worksite a request for the latest version of the object presently stored on a network;

    c. transmitting the unique number and a request to a server having access to the latest version of said object, over said network;

    d. receiving the request and the unique number at the server;

    e. computing, at the server, a second unique number indicative of the latest version of the object stored at the server;

    f. comparing, at the server, said first unique number with said second unique number; and

    g. transmitting encoded data from said server to said client worksite which informs the client worksite whether or not the object stored at the client worksite is the latest updated version of the object requested.

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