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Layered computing systems and methods

  • US 20030233647A1
  • Filed: 06/11/2003
  • Published: 12/18/2003
  • Est. Priority Date: 06/12/2002
  • Status: Active Grant
First Claim
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1. A set of computer readable media containing computer instructions for operating a layered computing environment, the set of computer readable media comprising at least one medium upon which is stored the computer instructions executable by a computing system to achieve the functions of:

  • (i) receiving from applications a read request for a read operation to a file system, the read request containing a file reference appropriate to the file system organization;

    (ii) a first determining whether or not the file reference is maintained in at least one enabled layer;

    (iii) if in the first determining a file reference is found not to be maintained in at least one enabled layer, causing the read operation to execute using the file reference of the read request;

    (iv) if in the first determining a file reference is found to be maintained in at least one enabled layer, identifying an owner layer from the set of enabled layers;

    (v) following the identifying an owner layer, identifying a virtual read reference utilizing information contained in the layer; and

    (vi) following the identifying a virtual read reference, causing the read operation to execute using the virtual read reference.

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