Method and system for policy class based data migration

1. A method for intelligent data migration, comprising:

identifying criteria for changing policy classes;

selecting an active data migration policy from a set of active data migration policies;

making a first determination that a criterion of the criteria for changing policy classes is met;

changing, based on the first determination, a first policy class of the active data migration policy to a second policy class;

allocating a first level of a system resource associated with the second policy class to support data migration, wherein the system resource comprises compute resources from a computer processor;

performing the data migration of data identified in the active data migration policy using the first level of the system resource;

allocating a second level of the system resource associated with the second policy class to support garbage collection; and

performing the garbage collection on a storage device identified in the active data migration policy using the second level of the system resource.

2. The method of claim 1 , wherein the data is one selected from a group consisting of accessed data and cold data.

3. The method of claim 1 , wherein the criterion is a used capacity of the storage device meeting a used capacity threshold.

4. The method of claim 1 , wherein the data migration of the data comprises performing a data transfer from the storage device to a cloud storage system.

5. The method of claim 4 , wherein the data migration of the data further comprises performing the data transfer based on a set of data migration priorities.

6. The method of claim 5 , wherein the set of data migration priorities comprises at least one selected from a group consisting of a data size priority, a data criticality priority, and a data retention priority.

7. The method of claim 1 , wherein the storage device resides on a backup storage system.

8. The method of claim 1 , further comprising:

making a second determination that the criterion is no longer met;

reverting, based on the second determination, the second policy class of the active data migration policy to the first policy class;

allocating a third level of the system resource associated with the first policy class to support data migration; and

continuing the data migration of the data identified in the active data migration policy using the third level of the system resource.

9. The method of claim 8 , wherein the first policy class is a lower policy class than the second policy class, wherein the first level of the system resource comprises a lower percentage of the system resource than the third level of the system resource.

10. The method of claim 8 , wherein the first policy class is a higher policy class than the second policy class, wherein the first level of the system resource comprises a higher percentage of the system resource than the third level of the system resource.

11. The method of claim 8 , further comprising:

allocating a fourth level of the system resource associated with the first policy class to support garbage collection; and

continuing the garbage collection on the storage device identified in the active data migration policy using the fourth level of the system resource.

12. The method of claim 11 , wherein the first policy class is a lower policy class than the second policy class, wherein the second level of the system resource comprises a lower percentage of the system resource than the fourth level of the system resource.

13. The method of claim 11 , wherein the first policy class is a higher policy class than the second policy class, wherein the second level of the system resource comprises a higher percentage of the system resource than the fourth level of the system resource.

14. The method of claim 1 , further comprising:

making a second determination that the criterion is still met;

based on the second determination:

retaining the second policy class of the active data migration policy;

continuing the data migration of the data identified in the active data migration policy using the first level of the system resource; and

continuing the garbage collection on the storage device identified in the active data migration policy using the second level of the system resource.

15. The method of claim 1 , further comprising:

prior to making the first determination:

making a second determination that an intelligent class change feature is enabled for the active data migration policy.

16. A system, comprising:

a backup storage system comprising a computer processor configured to:

identify criteria for changing policy classes;

select an active data migration policy from a set of active data migration policies;

make a determination that a criterion of the criteria for changing policy classes is met;

change, based on the determination, a first policy class of the active data migration policy to a second policy class;

allocate a first level of a system resource associated with the second policy class to support data migration, wherein the system resource comprises compute resources from the computer processor;

perform the data migration of data identified in the active data migration policy using the first level of the system resource;

allocate a second level of the system resource associated with the second policy class to support garbage collection; and

perform the garbage collection on a storage device identified in the active data migration policy using the second level of the system resource.

17. The system of claim 16 , wherein the backup storage system further comprises:

a storage device operatively connected to the computer processor,

wherein the data identified in the active data migration policy resides in the storage device.

18. The system of claim 17 , further comprising:

a cloud storage system operatively connected to the backup storage system,

wherein the data migration of the data comprises performing a data transfer from the storage device to the cloud storage system.

19. A non-transitory computer readable medium (CRM) comprising computer readable program code, which when executed by a computer processor, enables the computer processor to:

identify criteria for changing policy classes;

select an active data migration policy from a set of active data migration policies;

make a determination that a criterion of the criteria for changing policy classes is met;

change, based on the determination, a first policy class of the active data migration policy to a second policy class;

allocate a first level of a system resource associated with the second policy class to support data migration, wherein the system resource comprises compute resources from the computer processor;

perform the data migration of data identified in the active data migration policy using the first level of the system resource;

allocate a second level of the system resource associated with the second policy class to support garbage collection; and

perform the garbage collection on a storage device identified in the active data migration policy using the second level of the system resource.