Methods and apparatus for maintaining consistency during...

Details Methods and apparatus for maintaining consistency during... Methods and apparatus for maintaining consistency during...

2009-06-18

2011-11-29

Vo, Tim T (Department: 2168)

Data processing: database and file management or data structures

File or database maintenance

Synchronization

C707S600000, C707S610000, C707S624000

Reexamination Certificate

active

08069146

ABSTRACT:
Methods and apparatus for updating a database using a multi-dimensional data model in which data corresponding to the database are organized in multi-dimensional data blocks. Each data block has summary information associated therewith corresponding to a current state of evolution of the associated data block. Dependency information is maintained in the data model which identifies data dependencies within and among the data blocks. A list of change entries identifies changes made to the data blocks and times at which the changes were made. A request to apply a change entry to a data block is received. The change entry is applied to the data block, including generating a dependency list of data blocks whose data depends directly or indirectly from the updated data block. The data blocks in the dependency list are processed in accordance with a dependency update algorithm to update the data blocks in the dependency list.

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