In-place dynamically re-sizeable persistent historical database

Details In-place dynamically re-sizeable persistent historical database In-place dynamically re-sizeable persistent historical database

2006-02-14

2006-02-14

Wachsman, Hal D. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

History logging or time stamping

C702S045000, C073S861030

Reexamination Certificate

active

06999901

ABSTRACT:
The specification discloses a method of maintaining a historical database of information. The method describes up to eleven segments, each segment corresponding possibly to a different data logging rate in the historical database. Points, whether measured or calculated parameters, are grouped into segments based on which points may have their data logged at the same frequency. The points, in turn, contain pointers to logs, with entries in the log data corresponding to a time-stamp or tag of the segment to which the log belongs. Thus, points (and their corresponding logs) in different segments may be logged at different rates. The specification also discloses a method for dynamically resizing the historical database.

REFERENCES:
patent: 4173891 (1979-11-01), Johnson
patent: 4811249 (1989-03-01), Marsh
patent: 5754449 (1998-05-01), Hoshal et al.
patent: 6275783 (2001-08-01), Okamura
patent: 6662176 (2003-12-01), Brunet et al.

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