Journaling database changes using minimized journal entries...

Details Journaling database changes using minimized journal entries... Journaling database changes using minimized journal entries...

2008-04-24

2011-11-22

Pham, Khanh (Department: 2166)

Data processing: database and file management or data structures

File or database maintenance

Database backup

C707S604000, C707S745000

Reexamination Certificate

active

08065274

ABSTRACT:
A minimized journaling mechanism stores minimized journal data in a format that allows for display and outputting the journal data in human-readable form. When a change to a record occurs, instead of writing only the changed bytes, all of the bytes in each field that changed are written to the journal, along with all of the bytes in each field selected to be always journaled. A default object is created with default data in all of the fields. When the journal entry needs to be output in human-readable form, the default object is read, and the minimized journal entry is then overlaid on the default object. The result is an object that contains default data in all non-selected fields that were not changed, with the journal data in all fields and that did change and in all fields that were selected to always be journaled.

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