Parallel searching technique
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United States of America Patent
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Mar 16, 1999
Grant Date -
N/A
app pub date -
Feb 6, 1997
filing date -
Mar 15, 1996
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A parallel query manager accepts a list of file extents to be searched and produces a number of search lists, one for each disk to be searched. The query manager first uses a mapper to find out how the database spaces are stored on disk. It then matches the search extent list with the mapping information to determine which parts of which disks are to be searched. It then initiates several searches in parallel so that all the affected disks can be kept busy at the same time. The query manager then checks for return data on each stream, and merges the results.
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