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JPS57137936A - File system of data - Google Patents

File system of data

Info

Publication number
JPS57137936A
JPS57137936AJP56022545AJP2254581AJPS57137936AJP S57137936 AJPS57137936 AJP S57137936AJP 56022545 AJP56022545 AJP 56022545AJP 2254581 AJP2254581 AJP 2254581AJP S57137936 AJPS57137936 AJP S57137936A
Authority
JP
Japan
Prior art keywords
data record
data
file
page index
pages
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
Application number
JP56022545A
Other languages
Japanese (ja)
Inventor
Akio Kuwabara
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co LtdfiledCriticalNEC Corp
Priority to JP56022545ApriorityCriticalpatent/JPS57137936A/en
Publication of JPS57137936ApublicationCriticalpatent/JPS57137936A/en
Pendinglegal-statusCriticalCurrent

Links

Classifications

Landscapes

Abstract

PURPOSE:To remarkably improve the working efficiency of a file and an access speed, by dividing the file into a page index part and a page group of fixed length, and storing data recored in a variable length format. CONSTITUTION:A file 4 is divided into N+1 number of pages 8 of fixed length and one page index part 9. A data record in stored in the N+1 number of pages 8 in the ascending order of a key, and only the key, data and effective information are stored in a variable length format. In case when a specific data record is accessed, the data record concerned is accessed by reading out the page index part 9, comparing a key of a data record to be accessed, with the page index 10, and comparing the keys in order in the pages 8.
JP56022545A1981-02-181981-02-18File system of dataPendingJPS57137936A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP56022545AJPS57137936A (en)1981-02-181981-02-18File system of data

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP56022545AJPS57137936A (en)1981-02-181981-02-18File system of data

Publications (1)

Publication NumberPublication Date
JPS57137936Atrue JPS57137936A (en)1982-08-25

Family

ID=12085791

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP56022545APendingJPS57137936A (en)1981-02-181981-02-18File system of data

Country Status (1)

CountryLink
JP (1)JPS57137936A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS6345650A (en)*1986-08-121988-02-26Nec CorpFiling system
US5761739A (en)*1993-06-081998-06-02International Business Machines CorporationMethods and systems for creating a storage dump within a coupling facility of a multisystem enviroment
US9860315B2 (en)1998-09-102018-01-02International Business Machines CorporationControlling the state of duplexing of coupling facility structures

Cited By (5)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS6345650A (en)*1986-08-121988-02-26Nec CorpFiling system
US5761739A (en)*1993-06-081998-06-02International Business Machines CorporationMethods and systems for creating a storage dump within a coupling facility of a multisystem enviroment
US5875484A (en)*1993-06-081999-02-23International Business Machines CorporationMethod and system for determining and overriding information unavailability time at a coupling facility
US9860315B2 (en)1998-09-102018-01-02International Business Machines CorporationControlling the state of duplexing of coupling facility structures
US10491675B2 (en)2001-10-012019-11-26International Business Machines CorporationControlling the state of duplexing of coupling facility structures

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