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Caching optimization with disk and/or memory cache management

  • US 6,327,587 B1
  • Filed: 10/05/1998
  • Issued: 12/04/2001
  • Est. Priority Date: 10/05/1998
  • Status: Expired due to Term
First Claim
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1. A system for exploring relationships in data stored in a computer readable medium, comprising:

  • first logic to maintain sets of data in a computer readable medium, including at least one intensional expression and one extensional expression of at least one set resulting from an evaluation of a first query;

    second logic to transform a second query into a set program;

    third logic, cooperating with the first logic, to determine whether a sub-expression of the set program is satisfied by a set maintained by the first logic;

    fourth logic, cooperating with the third logic, to remove the sub-expression from the set program and to use the set maintained by the first logic that satisfies the sub-expression of the set program; and

    fifth logic for removing at least one of the sets from the computer readable medium based on at least one of usage history and set size.

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