Providing mappings between logical time values and real time values in a multinode system
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United States of America Patent
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Jul 31, 2007
Grant Date -
Dec 15, 2005
app pub date -
Jun 10, 2004
filing date -
Jun 10, 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 in a multinode system. The techniques include, if a first event occurs, then writing an LTV-to-RTV mapping to a non-volatile data structure. If a second event occurs, then a check is performed to determine whether any of the LTV-to-RTV mappings in the volatile data structure are newer than all LTV-to-RTV mappings in a non-volatile data structure. If there are newer mappings in the volatile data structure, then one or more LTV-to-RTV mappings are written to the non-volatile data structure based on those 'newer' LTV-to-RTV mappings from the volatile data structure. Upon receiving a request an LTV for a particular RTV, the particular RTV is determined based on information from an information source such as the volatile data structure or the non-volatile data structure.
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