Recovering a volume table and data sets

Patent metadata

Field	Value
Publication number	US-10146640-B2
Application number	US-201615224466-A
Country	US
Kind code	B2
Filing date	Jul 29, 2016
Priority date	Jun 27, 2012
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

Provided are a computer program product, system, and method for recovering a volume table and data sets from a volume. Content from a backup volume table comprising a valid backup of a volume table from backup of the volume is processed to generate a recovery volume table for a recovery volume. The data sets in the volume are processed to determine whether they are valid. The valid data sets are moved to the recovery volume. A data recovery operation is initiated for the data sets determined not to be valid.

First claim

What is claimed is:

1. A computer program product for data recovery of a volume having data sets in a storage device, the computer program product comprising a non-transitory computer readable storage medium having computer readable program code embodied therein that executes to perform operations, the operations comprising:
generating a recovery volume table from a backup volume table, wherein the backup volume table comprises volume table information for backup data sets comprising data sets in the volume as of a backup point-in-time, wherein the recovery volume table provides volume table information for data sets in a recovery volume recovered from the volume;
determining differences between the data sets in the volume and the recovery volume table resulting from changes to the data sets since the backup point-in-time;
modifying the recovery volume table based on the determined differences with the data sets in the volume; and
moving valid data sets to the recovery volume.

2. The computer program product of claim 1 , wherein the determining the differences comprises determining the data sets that have been deleted since the backup point-in-time, and wherein modifying the recovery volume table comprises deleting, from the recovery volume table, information on the data sets that are determined to have been deleted.

3. The computer program product of claim 1 , wherein the determining the differences comprises determining the data sets that have been added since the backup point-in-time, and wherein modifying the recovery volume table comprises adding information to the recovery volume table on the data sets that are determined to have been added since the backup point-in-time.

4. The computer program product of claim 1 , wherein the determining the differences comprises determining the data sets that have been modified since the backup point-in-time, and wherein modifying the recovery volume table comprises updating information in the recovery volume table on the data sets that are determined to have been modified since the backup point-in-time.

5. The computer program product of claim 1 , wherein the operations further comprise:
initiating a data recovery operation for the data sets determined not to be valid.

6. The computer program product of claim 1 , wherein the generating the recovery volume table comprises copying the backup volume table to the recovery volume table.

7. The computer program product of claim 1 , wherein the operations further comprise:
determining from data set records, the data sets in the volume, wherein the data set records are independent of a volume table, wherein the data set records have volume table information for the data sets currently in the volume and record changes to the volume table and the data sets.

8. A system in communication with a storage device having a volume with data sets comprising:
a processor; and
a computer readable storage medium having computer readable program code embodied therein executed by the processor to perform operations, the operations comprising:
generating a recovery volume table from a backup volume table, wherein the backup volume table comprises volume table information for backup data sets comprising data sets in the volume as of a backup point-in-time, wherein the recovery volume table provides volume table information for data sets in a recovery volume recovered from the volume;
determining differences between the data sets in the volume and the recovery volume table resulting from changes to the data sets since the backup point-in-time;
modifying the recovery volume table based on the determined differences with the data sets in the volume; and
moving valid data sets to the recovery volume.

9. The system of claim 8 , wherein the determining the differences comprises determining the data sets that have been deleted since the backup point-in-time, and wherein modifying the recovery volume table comprises deleting, from the recovery volume table, information on the data sets that are determined to have been deleted.

10. The system of claim 8 , wherein the determining the differences comprises determining the data sets that have been added since the backup point-in-time, and wherein modifying the recovery volume table comprises adding information to the recovery volume table on the data sets that are determined to have been added since the backup point-in-time.

11. The system of claim 8 , wherein the determining the differences comprises determining the data sets that have been modified since the backup point-in-time, and wherein modifying the recovery volume table comprises updating information in the recovery volume table on the data sets that are determined to have been modified since the backup point-in-time.

12. The system of claim 8 , wherein the operations further comprise:
initiating a data recovery operation for the data sets determined not to be valid.

13. The system of claim 8 , wherein the generating the recovery volume table comprises copying the backup volume table to the recovery volume table.

14. The system of claim 8 , wherein the operations further comprise:
determining from data set records, the data sets in the volume, wherein the data set records are independent of a volume table, wherein the data set records have volume table information for the data sets currently in the volume and record changes to the volume table and the data sets.

15. A method for handling data corruption, comprising:
generating a recovery volume table from a backup volume table, wherein the backup volume table comprises volume table information for backup data sets comprising data sets in a volume as of a backup point-in-time, wherein the recovery volume table provides volume table information for data sets in a recovery volume recovered from the volume;
determining differences between the data sets in the volume and the recovery volume table resulting from changes to the data sets since the backup point-in-time;
modifying the recovery volume table based on the determined differences with the data sets in the volume; and
moving valid data sets to the recovery volume.

16. The method of claim 15 , wherein the determining the differences comprises determining the data sets that have been deleted since the backup point-in-time, and wherein modifying the recovery volume table comprises deleting, from the recovery volume table, information on the data sets that are determined to have been deleted.

17. The method of claim 15 , wherein the determining the differences comprises determining the data sets that have been added since the backup point-in-time, and wherein modifying the recovery volume table comprises adding information to the recovery volume table on the data sets that are determined to have been added since the backup point-in-time.

18. The method of claim 15 , wherein the determining the differences comprises determining the data sets that have been modified since the backup point-in-time, and wherein modifying the recovery volume table comprises updating information in the recovery volume table on the data sets that are determined to have been modified since the backup point-in-time.

19. The method of claim 15 , further comprising:
initiating a data recovery operation for the data sets determined not to be valid.

20. The method of claim 15 , wherein the generating the recovery volume table comprises copying the backup volume table to the recovery volume table.

21. The method of claim 15 , further comprising:

Assignees

• IBM

Inventors

• Dudgeon Kyle B
• Mccune Franklin E
• Reed David C
• Smith Max D

Classifications

• G06F11/1435 Primary

  using file system or storage system metadata · CPC title

• G06F2201/805

  Real-time · CPC title

• G06F11/1448

  Management of the data involved in backup or backup restore · CPC title

• G06F11/1451

  by selection of backup contents · CPC title

• G06F11/1469 Primary

  Backup restoration techniques · CPC title