JPS5785141A - Log data obtaining device - Google Patents

Log data obtaining device

Info

Publication number
JPS5785141A
JPS5785141A JP16159780A JP16159780A JPS5785141A JP S5785141 A JPS5785141 A JP S5785141A JP 16159780 A JP16159780 A JP 16159780A JP 16159780 A JP16159780 A JP 16159780A JP S5785141 A JPS5785141 A JP S5785141A
Authority
JP
Japan
Prior art keywords
data
log
obtaining device
log data
bit row
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP16159780A
Other languages
Japanese (ja)
Other versions
JPS607814B2 (en
Inventor
Hideki Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16159780A priority Critical patent/JPS607814B2/en
Publication of JPS5785141A publication Critical patent/JPS5785141A/en
Publication of JPS607814B2 publication Critical patent/JPS607814B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G06T1/0007—Image acquisition

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Image Processing (AREA)

Abstract

PURPOSE:To reduce the storage capacity, by minimizing the obtainment of the log quantity of an after-image log data and a before-image log data by use of an optimum differential bit row generator. CONSTITUTION:Block data before updating and after updating, which have been inputted to data input terminals 27, 28, respectively are inputted to a differential detector 29, corresponding to each other. In the detector 29, corresponding data of both the data are collated at every byte, and a differential bit row is outputted to an optimum differential bit row generator 30. The generator 30 generates an optimum differential bit row. In a BI (before image) log data obtaining device 31 and an AI (after image) log data obtaining device 32, the block data inputted to the input terminals 27, 28, and the optimum differential bit row generated by the generator 30 are all synchronized by a tag signal, and a BI log data and an AI log data are fetched simultaneously from the obtaining device 31 and the obtaining device 32, respectively. Since these log quantities are obtained from the optimum differential bit row in this way, the log quantity is minimized.
JP16159780A 1980-11-17 1980-11-17 Log data acquisition device Expired JPS607814B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16159780A JPS607814B2 (en) 1980-11-17 1980-11-17 Log data acquisition device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16159780A JPS607814B2 (en) 1980-11-17 1980-11-17 Log data acquisition device

Publications (2)

Publication Number Publication Date
JPS5785141A true JPS5785141A (en) 1982-05-27
JPS607814B2 JPS607814B2 (en) 1985-02-27

Family

ID=15738162

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16159780A Expired JPS607814B2 (en) 1980-11-17 1980-11-17 Log data acquisition device

Country Status (1)

Country Link
JP (1) JPS607814B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193241A (en) * 1985-02-21 1986-08-27 Hitachi Ltd Updated career recording
US5675727A (en) * 1994-05-23 1997-10-07 Nec Corporation Difference recording apparatus having a processing unit, recording unit, log update section, and log comparator using a classification key in a log of input data

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6921342B1 (en) * 2020-03-30 2021-08-18 三菱電機株式会社 Control device and logging method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193241A (en) * 1985-02-21 1986-08-27 Hitachi Ltd Updated career recording
US5675727A (en) * 1994-05-23 1997-10-07 Nec Corporation Difference recording apparatus having a processing unit, recording unit, log update section, and log comparator using a classification key in a log of input data

Also Published As

Publication number Publication date
JPS607814B2 (en) 1985-02-27

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