System and method for migrating objects in content management systems through exploitation of file properties, temporal locality, and spatial locality

• US 20070156989A1
• Filed: 01/03/2006
• Published: 07/05/2007
• Est. Priority Date: 01/03/2006
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: So, Wai, Man, Kwai
• Granted Patent: US 7,552,300 B2
• Time in Patent Office: Days
• US Class Current: 711/165
• CPC Class Codes: G06F 3/0613 in relation to throughput
• CPC Class Codes: G06F 3/0649 Lifecycle management
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: Y10S 707/99953 Recoverability
• CPC Class Codes: Y10S 707/99955 Archiving or backup

Abstract

A migration object selection system selects data objects for migration from a source storage device to a target storage device. At a scheduled migration date, the system computes a benefit of migration for a selected data object based on adjustable weighted migration properties. If the benefit exceeds a predetermined threshold, the selected data object is migrated. Otherwise, the selected data object is not migrated. The weighted migration properties comprise last reference date, data object size, version, format, access speed of the source storage device, access speed of the target storage device, speed of a network, and location of the source storage device. The weighted migration properties are weighted with an adjustable weighting factor that indicates a relative importance of each of the weighted migration properties.

Claims

1. A processor-implemented method of selecting a plurality of data objects for migration from a source storage device to a target storage device, comprising:

at a scheduled migration date, computing a benefit of migration for a selected data object based on a plurality of weighted migration properties;

if the computed benefit exceeds a predetermined threshold, then migrating the selected data object; and

wherein the weighted migration properties comprise a weighted property of the data object and a weighted property of a data object transfer.

2. The method of claim 1, wherein the weighted properties of the data object comprise a last reference date, a data object size, a version, and a format.

3. The method of claim 1, wherein the weighted properties of the data object transfer comprise an access speed of the source storage device, an access speed of the target storage device, speed of a network, and location of a resource manager of the source storage device.

4. The method of claim 1, wherein the weighted properties are adjustable.

5. The method of claim 1, wherein the predetermined threshold is a fixed value.

6. The method of claim 1, wherein the predetermined threshold is a value based on a relative value compared to the benefit of migration of additional data objects.

7. The method of claim 1, wherein the weighted migration properties are weighted with a weighting factor indicating an importance of each of the weighted migration properties.

8. The method of claim 6, wherein the weighting factor is adjustable.

9. A computer program product having program codes stored on a computer-usable medium for selecting a plurality of data objects for migration from a source storage device to a target storage device, comprising:

a program code for computing a benefit of migration for a selected data object, at a scheduled migration date, based on a plurality of weighted migration properties;

a program code for migrating the selected data object if the computed benefit exceeds a predetermined threshold; and

wherein the weighted migration properties comprise a weighted property of the data object and a weighted property of a data object transfer.

10. The computer program product of claim 9, wherein the weighted properties of the data object comprise a last reference date, a data object size, a version, and a format.

11. The computer program product of claim 9, wherein the weighted properties of the data object transfer comprise an access speed of the source storage device, an access speed of the target storage device, speed of a network, and location of a resource manager of the source storage device.

12. The computer program product of claim 9, wherein the weighted properties are adjustable.

13. The computer program product of claim 9, wherein the predetermined threshold is a fixed value.

14. The computer program product of claim 9, wherein the predetermined threshold is a value based on a relative value compared to the benefit of migration of additional data objects.

15. The computer program product of claim 9, wherein the weighted migration properties are weighted with a weighting factor indicating an importance of each of the weighted migration properties.

16. The computer program product of claim 14, wherein the weighting factor is adjustable.

17. A processor-implemented system for selecting a plurality of data objects for migration from a source storage device to a target storage device, comprising:

at a scheduled migration date, a migration objection selection module for computing a benefit of migration for a selected data object based on a plurality of weighted migration properties;

a resource manager for migrating the selected data object if the computed benefit exceeds a predetermined threshold; and

wherein the weighted migration properties comprise a weighted property of the data object and a weighted property of a data object transfer.

18. The system of claim 17, wherein the weighted properties of the data object comprise a last reference date, a data object size, a version, and a format.

19. The system of claim 17, wherein the weighted properties of the data object transfer comprise an access speed of the source storage device, an access speed of the target storage device, speed of a network, and location of a resource manager of the source storage device.

20. The system of claim 17, wherein the weighted properties are adjustable.