Providing mappings between logical time values and real time values
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United States of America Patent
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Jul 3, 2007
Grant Date -
Dec 15, 2005
app pub date -
May 27, 2004
filing date -
May 27, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
Techniques are provided for providing mappings between logical time values and real time values for a database. The techniques include, if a first event related to the database occurs, writing an entry of a current LTV and a current RTV in a volatile mapping data structure; and if a second event related to the database occurs, writing one or more entries in a non-volatile mapping data structure based on information contained in the volatile mapping data structure. The techniques also include, once a request from a requestor to provide an LTV that is mapped to a particular RTV is received, determining the LTV for the particular RTV, based on the particular RTV and information from a source, wherein the source is one of the volatile mapping data structure and the non-volatile mapping data structure; and providing the LTV that is mapped to the particular RTV to the requestor.
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