JPS57109048A - Recovery system of data set - Google Patents

Recovery system of data set

Info

Publication number
JPS57109048A
JPS57109048A JP55186155A JP18615580A JPS57109048A JP S57109048 A JPS57109048 A JP S57109048A JP 55186155 A JP55186155 A JP 55186155A JP 18615580 A JP18615580 A JP 18615580A JP S57109048 A JPS57109048 A JP S57109048A
Authority
JP
Japan
Prior art keywords
data set
data
ctlg
vol3
catalog
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
JP55186155A
Other languages
Japanese (ja)
Inventor
Toshimi Mizuma
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 JP55186155A priority Critical patent/JPS57109048A/en
Publication of JPS57109048A publication Critical patent/JPS57109048A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE:To perform the recovery of a data set efficiently, by writing data as physical images by securing an extent required to write data in a direct access device. CONSTITUTION:In a volume VOL1, a catalog CTLG is stored, and a data set A is stored by being divided into the extents E1 and E2 of a volume VOL2 and the extent E3 of a volume VOL3. During the backup operation of the data set A, data are read out as physical images and stored on a magnetic tape MT together with the catalog CTLG. When backup data on the tape MT is to be restored in the volumes VOL2 and VOL3, necessary extents are secured directly on the volumes VOL2 and VOL3 on the basis of the catalog information CTLG recorded on the tape MT. Then, the catalog information of the data set is updated on the basis of the data set written later.
JP55186155A 1980-12-26 1980-12-26 Recovery system of data set Pending JPS57109048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55186155A JPS57109048A (en) 1980-12-26 1980-12-26 Recovery system of data set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55186155A JPS57109048A (en) 1980-12-26 1980-12-26 Recovery system of data set

Publications (1)

Publication Number Publication Date
JPS57109048A true JPS57109048A (en) 1982-07-07

Family

ID=16183335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55186155A Pending JPS57109048A (en) 1980-12-26 1980-12-26 Recovery system of data set

Country Status (1)

Country Link
JP (1) JPS57109048A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125460A (en) * 1982-12-30 1984-07-19 Fujitsu Ltd Saving and restoring system of file
JPS62226266A (en) * 1986-03-28 1987-10-05 Nec Corp Simultaneous access and roll-back control system
JPS63196959A (en) * 1987-02-10 1988-08-15 Nec Corp Saving and restoring system for file

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125460A (en) * 1982-12-30 1984-07-19 Fujitsu Ltd Saving and restoring system of file
JPS62226266A (en) * 1986-03-28 1987-10-05 Nec Corp Simultaneous access and roll-back control system
JPS63196959A (en) * 1987-02-10 1988-08-15 Nec Corp Saving and restoring system for file

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