Reduction and optiminization of operational query expressions applied to information spaces between nodes in a publish/subscribe system
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United States of America Patent
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Feb 7, 2006
Issued Date -
N/A
app pub date -
Nov 21, 2003
filing date -
May 28, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Techniques for arranging operations performable on information in an information processing system are provided. In a system having a plurality of information producers and a plurality of information subscribers, paths are identified over which information traverses, and within which the information is subject to select and/or transform operations. The present invention optimizes the system by reorganizing the sequence of select and transform operations so that transforms follow select operations; and by combining multiple select and transform operations into single select and transform operations, respectively. Using these optimizations, the processing resources of the system can be reorganized, and/or information flow graphs describing the system can be designed, so that the select operations are 'pushed' toward the producers, and transform operations are 'pushed' toward the subscribers. Efficient content-based routing systems can then be used to implement the select operations.
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