Techniques for facilitating backup and restore of migrated files
First Claim
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1. A computer-implemented method of performing a file backup operation, the method comprising:
- detecting that a backup application is backing-up a stub file to a backup medium, wherein the stub file is stored in a first storage location in place of a first file due to migration of a portion of the first file from the first storage location; and
enabling backup of the stub file to the backup medium without recalling the migrated portion to the first storage location.
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Abstract
Techniques for facilitating backup and restore operations in a storage environment comprising migrated files. Backup and restore operations on migrated files are performed without triggering recall while maintaining data integrity.
157 Citations
30 Claims
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1. A computer-implemented method of performing a file backup operation, the method comprising:
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detecting that a backup application is backing-up a stub file to a backup medium, wherein the stub file is stored in a first storage location in place of a first file due to migration of a portion of the first file from the first storage location; and
enabling backup of the stub file to the backup medium without recalling the migrated portion to the first storage location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A computer-implemented method of restoring a file, the method comprising:
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detecting that a restore application has restored a file from a backup medium to a first storage location;
determining that the restored file is a stub file corresponding to a first file, wherein a portion of the first file has been migrated from the first storage location; and
setting a logical size of the restored stub file to a logical size of the first file prior to migration of the portion of the first file. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A computer program product stored on a computer-readable medium for performing a file backup operation, the computer program product comprising:
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code for detecting that a backup application is backing-up a stub file to a backup medium, wherein the stub file is stored in a first storage location in place of a first file due to migration of a portion of the first file from the first storage location; and
code for enabling backup of the stub file to the backup medium without recalling the migrated portion to the first storage location. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A computer program product stored on a computer-readable medium for restoring a file, the computer program product comprising:
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code for detecting that a restore application has restored a file from a backup medium to a first storage location;
code for determining that the restored file is a stub file corresponding to a first file, wherein a portion of the first file has been migrated from the first storage location; and
code for setting a logical size of the restored stub file to a logical size of the first file prior to migration of the portion of the first file. - View Dependent Claims (22, 23, 24, 25)
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26. An apparatus for performing a file backup operation, the apparatus comprising:
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a first storage unit;
a second storage unit;
a backup medium; and
a data processing system;
wherein the first storage unit stores a stub file in place of a first file due to migration of a portion of the first file from the first storage unit to the second storage unit; and
wherein the data processing system is configured to;
detect that a backup application is backing-up the stub file to the backup medium; and
enable backup of the stub file to the backup medium without recalling the migrated portion from the second storage unit to the first storage unit. - View Dependent Claims (27)
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28. An apparatus for performing restoring a file, the apparatus comprising:
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a first storage unit;
a second storage unit;
a backup medium; and
a data processing system; and
wherein the data processing system is configured to;
detect that a restore application has restored a file from the backup medium to the first storage unit;
determine that the restored file is a stub file corresponding to a first file, wherein a portion of the first file has been migrated from the first storage unit to the second storage unit; and
set a logical size of the restored stub file to a logical size of the first file prior to migration of the portion of the first file. - View Dependent Claims (29, 30)
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Specification