JPS5713563A - Data access system in auxiliary memory device - Google Patents
Data access system in auxiliary memory deviceInfo
- Publication number
- JPS5713563A JPS5713563A JP8731680A JP8731680A JPS5713563A JP S5713563 A JPS5713563 A JP S5713563A JP 8731680 A JP8731680 A JP 8731680A JP 8731680 A JP8731680 A JP 8731680A JP S5713563 A JPS5713563 A JP S5713563A
- Authority
- JP
- Japan
- Prior art keywords
- record
- data
- read
- area
- designated
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
Abstract
PURPOSE:To attain a high speed access property and a data independent property, by transferring a data to a read/write part from a control area if a data which is read by referring to a control information is already read in the control area, when repeating a data access. CONSTITUTION:In case of read, when an instruction of CALL SUB is executed, a CPU shifts its execution to a subroutine 9, and executes the following processing by the subroutine 9. At the first time, a record of a designated record No. in a file, which is designated by position information is stored, a record exceeding the record No. is transferred to a control area from an auxiliary memory device, upper and lower limit values of a record stored in the area 8 is stored as a control information, and after that, a data of the designated record No. is transferred to a read/write part 3. At the second time and thereafter, whether a record of a designated record No. exists in the area 8 or not is decided by use of the control information, and if it exists, a data is transferred to the part 3 from the area 8, and unless it exists, the processing is executed in the same way as the first time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8731680A JPS5713563A (en) | 1980-06-27 | 1980-06-27 | Data access system in auxiliary memory device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8731680A JPS5713563A (en) | 1980-06-27 | 1980-06-27 | Data access system in auxiliary memory device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5713563A true JPS5713563A (en) | 1982-01-23 |
Family
ID=13911429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8731680A Pending JPS5713563A (en) | 1980-06-27 | 1980-06-27 | Data access system in auxiliary memory device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5713563A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6162124A (en) * | 1984-09-03 | 1986-03-31 | Hitachi Ltd | Data transfer system |
JP2014179086A (en) * | 2013-03-13 | 2014-09-25 | Seagate Technology Llc | Apparatus, system and method for selecting among non-volatile memory units having different minimum addressable data unit sizes, and computer readable medium |
-
1980
- 1980-06-27 JP JP8731680A patent/JPS5713563A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6162124A (en) * | 1984-09-03 | 1986-03-31 | Hitachi Ltd | Data transfer system |
JP2014179086A (en) * | 2013-03-13 | 2014-09-25 | Seagate Technology Llc | Apparatus, system and method for selecting among non-volatile memory units having different minimum addressable data unit sizes, and computer readable medium |
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