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SYSTEMS AND METHODS FOR USING PROVENANCE INFORMATION FOR DATA RETENTION IN STREAM-PROCESSING

  • US 20100287204A1
  • Filed: 11/13/2007
  • Published: 11/11/2010
  • Est. Priority Date: 11/13/2007
  • Status: Active Grant
First Claim
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1. A method for determining data usage based on provenance information, in a stream-processing system, the method comprising:

  • progressively setting usage information for output stream data objects (SDOs);

    determining input SDOs that an output SDO depends on, based on a provenance dependency function;

    recursively feeding back the usage information for a subset of SDOs that can be discarded; and

    discarding the subset of SDOs.

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