Mirroring, in memory, data from disk to improve query performance
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United States of America Patent
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Jan 30, 2018
Grant Date -
Feb 4, 2016
app pub date -
Oct 13, 2015
filing date -
Sep 21, 2013
priority date (Note) -
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Abstract
Techniques are provided for maintaining data persistently in one format, but making that data available to a database server in more than one format. For example, one of the formats in which the data is made available for query processing is based on the on-disk format, while another of the formats in which the data is made available for query processing is independent of the on-disk format. Data that is in the format that is independent of the disk format may be maintained exclusively in volatile memory to reduce the overhead associated with keeping the data in sync with the on-disk format copies of the data.
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