Nec Corporation

Divyakant Agrawal

Wen-Syan Li

Kasim Selcuk Candan

Wen Li

Kasim Selouk Candan

Various systems and methods are describe for determining dynamically generated content to be invalidated as a result of changes to underlying data. In one method, invalidation processing is performed using a delayed version of the database that reflects the state of the database at the beginning of a preceding processing cycle, and an update log that reflects all updates since the beginning of the preceding processing cycle. In another method, invalidation processing is performed by locking a database which is locked during processing so as to reflect the state of the database at the beginning of processing, and an update log that reflects all updates to the database since the beginning of the preceding processing cycle. In another method, invalidation processing uses the database while it is freely updated during said processing, and the update log of the database.

System and methods for invalidation to enable caching of dynamically generated content

Method and apparatus for intelligent network bandwidth and system resource utilization for web content fetch and refresh

A system for updating Web pages stored in cache based on modifications to data stored in a database is disclosed. The system for updating stored Web pages may be part of a larger system having a database management system for storing data used to generate Web pages. The database management system is capable of identifying modified data stored in the database. The system for updating stored Web pages is comprised of one or more servers programmed for maintaining associations between the stored Web pages and the stored data, and receiving the identity of modified data from the memory management system. In addition, the servers are capable of determining, from the identified modified data and the maintained associations, which stored Web pages are associated with the identified modified data. Furthermore, the servers are capable of communicating an update command to the cache that contains the stored Web pages associated with the identified modified data, for the purpose of updating the stored Web pages.

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Santa Barbara, CA, United States of America

Divyakant Agrawal