Method and system to reclaim disk space by deleting save sets of a backup

• US 10,445,183 B1
• Filed: 06/26/2015
• Issued: 10/15/2019
• Est. Priority Date: 06/26/2015
• Status: Active Grant

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Inventors: Dobrean, Adrian, Zak, Dorota
• Primary Examiner(s): Pham, Khanh B
• Application Number:
  US14/752,766
• Time in Patent Office: 1,572 Days
• CPC Class Codes: G06F 11/1448 Management of the data involved in backup or backup restore
• CPC Class Codes: G06F 11/1451 by selection of backup contents
• CPC Class Codes: G06F 11/1464 for networked environments
• CPC Class Codes: G06F 16/162 Delete operations erasing in storage systems G06F3/0652
• CPC Class Codes: G06F 16/174 Redundancy elimination performed by the file system management of the data involved in backup or backup restore using de-duplication of the data G06F11/14

Abstract

Embodiments are described for improved management of backed up data from a client device to a storage device. The storage device may be coupled to a backup server across a network. A backup of data from an application on a client device to a storage device may fail while the backup is in progress. Systems and methods described herein can detect and remove incomplete backups. Systems and methods described herein can also scan for, and delete, save sets of a backups within a specified time interval. Systems and methods described herein can update metadata that describes existing backup data so that existing backups may be used with an updated or changed application software.

Claims

1. A computer-implemented method comprising:

presenting, on a client device, a user interface that receives user selection criteria to delete one or more save sets of a backup of client device data that meet the selection criteria;

receiving, on the client device, a request to delete one or more save sets of client device data in a backup stored in a storage system, wherein the storage system stores a plurality of backups from a plurality of client devices, the request comprising user selection criteria to delete one or more save sets of a backup of client device data and metadata in a metadata database associated with the backup, the selection criteria specifying at least a user selected time interval of when the save sets were generated and an identification of the client device, wherein a save set comprises a storage container containing one or more save files;

in response to receiving the request, searching the metadata database for one or more save set metadata records matching the user selection criteria specified by the request and the identification of the user client device;

for each save set metadata record matching the user selection criteria;

determining whether the user is permitted to delete a save set associated with the save set metadata record;

in response to determining that the user is permitted to delete the save set associated with the save set metadata;

determining a filename of a save set corresponding to the save set metadata record;

determining, from the save set metadata record, a directory of one or more keys in the metadata database, each key in the directory comprising a pointer to a save file within the save set;

deleting the one or more keys, and the directory that held the one or more keys, from the metadata database;

deleting the save set on the storage device; and

deleting the save set metadata record from the metadata database.

2. The method of claim 1, wherein determining whether the user is permitted to delete the save set associated with the save set metadata record comprises:

accessing a policy associated with the user;

determining an application that generated the save set associated with the save set metadata record;

determining whether the policy permits the user to the delete the save set, based at least in part on the application that generated the save set.

3. The method of claim 1, further comprising:

in response to determining that the user is not permitted to delete the save set associated with the metadata record, notifying the user via the user interface that the user is not permitted to delete the save set associated with the save set metadata record and that the save set associated with the metadata record was not deleted.

4. The method of claim 2, wherein the selection criteria comprises a specified client device, and a backup policy enforces a rule that the client device only has permission to delete save sets from a storage device that the client device initially generated.

5. The method of claim 1, wherein the one or more metadata records matching the user selection criteria form a root index of all save files in all save sets on the storage system for the identified client device.

6. The method of claim 1, wherein the user selection criteria further specifies a backup server to which the storage device is communicatively coupled, and save sets are deleted from only the backup server specified in the user selection criteria.

7. The method of claim 1, wherein determining one or more save sets comprises determining save sets for a specified application.

8. A non-transitory computer-readable medium programmed with executable instructions that, when executed by a processing system having at least one hardware processor, perform operations comprising:

presenting, on a client device, a user interface that receives user selection criteria to delete one or more save sets of a backup of client device data that meet the selection criteria;

receiving, on the client device, a request to delete one or more save sets of the client device in a backup stored in a storage system, wherein the storage system stores a plurality of backups from a plurality of client devices, the request comprising user selection criteria to delete one or more save sets of a backup of client device data and metadata associated with the one or more save sets, the selection criteria specifying at least a user selected time interval of when the save sets were generated and an identification of the client device, wherein a save set comprises a storage container containing one or more save files;

in response to receiving the request, searching the metadata database for one or more save set metadata records matching the user selection criteria specified by the request and the identification of the client device;

for each save set metadata record matching the user selection criteria;

determining whether the user is permitted to delete a save set associated with the save set metadata record;

in response to determining that the user is permitted to delete the save set associated with the save set metadata;

determining a filename of a save set corresponding to the save set metadata record;

determining, from the save set metadata record, a directory of one or more keys in the metadata database, each key in the directory comprising a pointer to a save file within the save set;

deleting the one or more keys, and the directory that held the one or more keys, from the metadata database;

deleting the save set on the storage device; and

deleting the save set metadata record from the metadata database.

9. The medium of claim 8, wherein determining whether the user is permitted to delete the save set associated with the save set metadata record comprises:

accessing a policy associated with the user;

determining an application that generated the save set associated with the save set metadata record;

determining whether the policy permits the user to the delete the save set, based at least in part on the application that generated the save set.

10. The medium of claim 8, further comprising:

in response to determining that the user is not permitted to delete the save set associated with the metadata record, notifying the user via the user interface that the user is not permitted to delete the save set associated with the save set metadata record and that the save set associated with the metadata record was not deleted.

11. The medium of claim 9, wherein the selection criteria comprises a specified client device, and a backup policy enforces a rule that the client device only has permission to delete save sets from a storage device that the client initially generated.

12. The medium of claim 8, wherein the or more metadata records matching the user selection criteria form a root index of all save files in all save sets on the storage system for the identified client device.

13. The medium of claim 8, wherein the user selection criteria further specifies a backup server to which the storage device is communicatively coupled, and the save sets are deleted from only the backup server specified in the user selection criteria.

14. The medium of claim 8, wherein determining one or more save sets comprises determining save sets for a specified application.

15. A system comprising a processing system having at least one hardware processor coupled to a memory programmed with executable instructions that, when executed by the processing system, perform operations comprising:

presenting, on a client device, a user interface that receives user selection criteria to delete one or more save sets of a backup of client device data that meets the selection criteria;

receiving a request to delete one or more save sets of the client device data in a backup stored in a storage system, wherein the storage system stores a plurality of backups from a plurality of client devices, the request comprising user selection criteria specifying to delete one or more save sets of a backup of client device data and the metadata associated with the one or more of the save sets, the selection criteria specifying at least a user selected time interval of when the save sets were generated and an identification of the client device, wherein a save set comprises a storage container containing one or more save files;

in response to receiving the request, searching the metadata database for one or more save set metadata records matching the user selection criteria specified by the request and the identification of the client device;

for each save set metadata record matching the user selection criteria;

determining whether the user is permitted to delete a save set associated with the save set metadata record;

in response to determining that the user is permitted to delete the save set associated with the save set metadata;

determining a filename of a save set corresponding to the save set metadata record;

determining, from the save set metadata record, a directory of one or more keys in the metadata database, each key in the directory comprising a pointer to a save file within the save set;

deleting the one or more keys, and the directory that held the one or more keys, from the metadata database;

deleting the save set on the storage device; and

deleting the save set metadata record from the metadata database.

16. The system of claim 15, wherein determining whether the user is permitted to delete the save set associated with the save set metadata record comprises:

accessing a policy associated with the user;

determining an application that generated the save set associated with the save set metadata record;

determining whether the policy permits the user to the delete the save set, based at least in part on the application that generated the save set.

17. The system of claim 15, further comprising:

in response to determining that the user is not permitted to delete the save set associated with the metadata record, notifying the user via the user interface that the user is not permitted to delete the save set associated with the save set metadata record and that the save set associated with the metadata record was not deleted.

18. The system of claim 16, wherein the selection criteria comprises a specified client device, and a backup policy enforces a rule that the client device only has permission to delete save sets from a storage device that the client device initially generated.

19. The system of claim 15, wherein one or more metadata records the user selection criteria form a root index of all save files in all save sets on the storage system for the identified client device.

20. The system of claim 15, wherein the user selection criteria further specifies a backup server to which the storage device is communicatively coupled, and save sets are deleted from only the backup server specified in the user selection criteria.

21. The system of claim 15, wherein determining one or more save sets comprises determining save sets for a specified application.