JPS54162938A - 2-step structure filing system - Google Patents

2-step structure filing system

Info

Publication number
JPS54162938A
JPS54162938A JP7249078A JP7249078A JPS54162938A JP S54162938 A JPS54162938 A JP S54162938A JP 7249078 A JP7249078 A JP 7249078A JP 7249078 A JP7249078 A JP 7249078A JP S54162938 A JPS54162938 A JP S54162938A
Authority
JP
Japan
Prior art keywords
area
file
record
block
units
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
JP7249078A
Other languages
Japanese (ja)
Other versions
JPS6051731B2 (en
Inventor
Shunichi Tashiro
Tomoaki Chiba
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP53072490A priority Critical patent/JPS6051731B2/en
Publication of JPS54162938A publication Critical patent/JPS54162938A/en
Publication of JPS6051731B2 publication Critical patent/JPS6051731B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

PURPOSE: To realize a filing system featuring a quick access by providing the 1st file containing several record blocks and the 2nd file composed of the file data link area and the vacancy control area.
CONSTITUTION: The file features the 2-step structure: the 1st file in which record block 32 possessing several data record areas 31; and the 2nd file comprising file data link area 27 of m+1Wm+n units possessing the index data regarding the 1st file and m-units of vacancy control record area 25. In case the data is added, the key coinciding with designation key A is found out in key area 21 and within the range of m+1Wm+n units to examine area 27. And if the addition is possible to block 32, the state of area 27 is renewed to be memorized in addition to block 32. In case the addition is impossible, the vacant state is examined in area 25 and the memorization is given to other vacant block 32. And the fact that the corresponding block is under use is memorized in area 27. In the same way, the renewal and deletion are carried out for the record.
COPYRIGHT: (C)1979,JPO&Japio
JP53072490A 1978-06-15 1978-06-15 Two-tier file system Expired JPS6051731B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53072490A JPS6051731B2 (en) 1978-06-15 1978-06-15 Two-tier file system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53072490A JPS6051731B2 (en) 1978-06-15 1978-06-15 Two-tier file system

Publications (2)

Publication Number Publication Date
JPS54162938A true JPS54162938A (en) 1979-12-25
JPS6051731B2 JPS6051731B2 (en) 1985-11-15

Family

ID=13490807

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53072490A Expired JPS6051731B2 (en) 1978-06-15 1978-06-15 Two-tier file system

Country Status (1)

Country Link
JP (1) JPS6051731B2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57172463A (en) * 1981-04-17 1982-10-23 Toshiba Corp Picture storage system
JPS584437A (en) * 1981-06-30 1983-01-11 Fujitsu Ltd Expanding system of prime region
JPS5852741A (en) * 1981-09-25 1983-03-29 Fuji Facom Corp File processing system
JPS58168167A (en) * 1982-03-15 1983-10-04 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン List merger
DE3509907A1 (en) * 1984-03-19 1985-10-03 Olympus Optical Co., Ltd., Tokio/Tokyo DEVICE FOR STORING AND RECOVERING INFORMATION
JPS635427A (en) * 1986-06-26 1988-01-11 Fuji Electric Co Ltd File access method
JPS63226747A (en) * 1987-03-16 1988-09-21 Fujitsu Ltd Data set accessing system
JPH02138619A (en) * 1989-10-04 1990-05-28 Casio Comput Co Ltd Data retrieving and sorting device for electronic equipment
JPH06311473A (en) * 1991-08-07 1994-11-04 Nikon Corp Picture recorder
JPH07240895A (en) * 1991-06-12 1995-09-12 Nikon Corp Image recorder

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57172463A (en) * 1981-04-17 1982-10-23 Toshiba Corp Picture storage system
JPS584437A (en) * 1981-06-30 1983-01-11 Fujitsu Ltd Expanding system of prime region
JPS5852741A (en) * 1981-09-25 1983-03-29 Fuji Facom Corp File processing system
JPS58168167A (en) * 1982-03-15 1983-10-04 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン List merger
DE3509907A1 (en) * 1984-03-19 1985-10-03 Olympus Optical Co., Ltd., Tokio/Tokyo DEVICE FOR STORING AND RECOVERING INFORMATION
JPS635427A (en) * 1986-06-26 1988-01-11 Fuji Electric Co Ltd File access method
JPS63226747A (en) * 1987-03-16 1988-09-21 Fujitsu Ltd Data set accessing system
JPH02138619A (en) * 1989-10-04 1990-05-28 Casio Comput Co Ltd Data retrieving and sorting device for electronic equipment
JPH07240895A (en) * 1991-06-12 1995-09-12 Nikon Corp Image recorder
JPH06311473A (en) * 1991-08-07 1994-11-04 Nikon Corp Picture recorder

Also Published As

Publication number Publication date
JPS6051731B2 (en) 1985-11-15

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