Multi-version data caching
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United States of America Patent
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Aug 31, 2004
Grant Date -
N/A
app pub date -
Aug 4, 2001
filing date -
Aug 4, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A system and method for caching multiple versions of a data item (e.g., web page, portion of a web page, data table, data object) and determining which of the multiple versions is most responsive to a particular request. A request is received and an initial cache lookup is done with a data identifier (e.g., URL, URI) extracted from the request. If the lookup is unsuccessful (i.e., nothing is returned), the request is passed to an origin server (e.g., web server, data server). If the lookup is successful, it may provide or identify the desired data item (if one version of the data item is served for all requests) or a policy to be applied to determine which version to serve. The cache applies the policy, which identifies the additional parameters, cookies or other information to be considered, and a second lookup is done with the additional information.
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