Difference recording apparatus having a processing unit, recordi

Details Difference recording apparatus having a processing unit, recordi Difference recording apparatus having a processing unit, recordi

1995-05-22

1997-10-07

Lee, Thomas C.

Excavating

39518216, 39518221, 395800, 371 671, 371 72, G06F 1300

Patent

active

056757271

ABSTRACT:
A difference recording apparatus includes a log comparator, a processing unit, a recording unit, and a log update section. The log comparator detects a log difference by using a classification key in a log of input data. The processing unit restores the log by using difference data from the log comparator. The recording unit records the log restored by the processing unit. The log update section limits recording of a log of identical data in the recording unit within a unit time on the basis of the presence/absence of a difference detected by the log comparator and an upper limit of log acquisition.

REFERENCES:
patent: 5043866 (1991-08-01), Myre, Jr. et al.
patent: 5193162 (1993-03-01), Bordsen et al.
patent: 5321832 (1994-06-01), Tanaka et al.
patent: 5333303 (1994-07-01), Mohan
patent: 5475624 (1995-12-01), West

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