JPS54162938A - 2-step structure filing system - Google Patents
2-step structure filing systemInfo
- 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
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
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)
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 |
-
1978
- 1978-06-15 JP JP53072490A patent/JPS6051731B2/en not_active Expired
Cited By (10)
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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