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Multi-tier caching system

  • US 6,732,237 B1
  • Filed: 08/29/2000
  • Issued: 05/04/2004
  • Est. Priority Date: 08/29/2000
  • Status: Expired due to Term
First Claim
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1. A method of responding to a data request in a computer system having multiple caches, the method comprising:

  • receiving a first data request from a user;

    searching a first memory for a first data item responsive to said first data request, wherein the contents of said first memory are managed by an operating system;

    searching a second memory for said first data item, wherein the contents of said second memory are managed by an application program;

    if said searches of said first memory and said second memory are unsuccessful;

    receiving said first data item from a storage device other than said first memory and said second memory; and

    identifying one of said first memory and said second memory in which to store said first data item for serving in response to a later data request; and

    serving said first data item to said user;

    wherein said first data request comprises a parameter having a value, and wherein said identifying comprises storing said first data item in said second memory if a second data item different from said first data item must be served to a second data request having a different value for said parameter than said first data request.

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