Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2007-02-27
2007-02-27
Channavajjala, Srirama (Department: 2166)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000, C707S793000, C707S793000, C707S793000, C711S142000, C711S152000, C711S171000
Reexamination Certificate
active
10607885
ABSTRACT:
Method and apparatus for expanding usable space for an application data file. A control file is maintained with control structures that indicate available and allocated portions of usable space in the data file, along with quantities of available space in portions of the data file. Access to the control structures is limited while the file is undergoing expansion. Space is allocated in the control file for new versions of control structures, and the contents of the control structures are copied to the space for the new versions of the control structures. Pointers that reference the control structures and that are maintained in the control file are updated to reference the new versions of the first and second control structures.
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Crandall Sherry L.
Titus Scott L.
Channavajjala Srirama
Crawford & Maunu PLLC
Johnson Charles A.
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