Segmented global area database

Details Segmented global area database Segmented global area database

2007-05-22

2007-05-22

Vo, Tim (Department: 2168)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000

Reexamination Certificate

active

10713650

ABSTRACT:
Embodiments of the present invention relate to memory management methods and systems for object-oriented databases (OODB). In an embodiment, a database includes a plurality of memory-mapped file segments stored on at least one nonvolatile memory medium and not in main memory. An application program connects to the database. A fault handler associated with the database is registered with the operating system of the application program. The fault handler catches a segmentation fault that is issued for an object referenced by the application program and resident in the database. A file segment corresponding to the referenced object is found and mapped into main memory. The application program is restarted. Because data is transparently mapped into and out of the main memory without copying the data, objects may be read with near zero latency, and size restrictions on the database may be eliminated.

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