Authorization-based file exclusion technique for block-based storage

• US 10,585,757 B1
• Filed: 09/30/2016
• Issued: 03/10/2020
• Est. Priority Date: 09/30/2016
• Status: Active Grant

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: EMC IP Holdings Company LLC
• Inventors: Jagannatha, Manjunath, Kumar, Kiran M V, Panem, Ravi Shankar
• Primary Examiner(s): Chbouki, Tarek
• Application Number:
  US15/282,847
• Time in Patent Office: 1,257 Days
• Field of Search: None
• CPC Class Codes: G06F 11/1451 by selection of backup contents
• CPC Class Codes: G06F 11/1469 Backup restoration techniques
• CPC Class Codes: G06F 16/162 Delete operations erasing in storage systems G06F3/0652
• CPC Class Codes: G06F 16/188 Virtual file systems
• CPC Class Codes: G06F 2201/815 Virtual middleware or OS functionality using virtual machines to implement generic software techniques for error detection or fault masking G06F11/1484
• CPC Class Codes: G06F 2201/84 Using snapshots, i.e. a logical point-in-time copy of the data

Abstract

One embodiment is related to a method for excluding files from a backup image file during a backup operation, comprising: determining files to be excluded from the backup image; taking a first snapshot of a source volume; exposing an iSCSI (Internet Small Computer System Interface) disk with the first snapshot being a target; deleting files to be excluded from the exposed iSCSI disk; taking a second snapshot of the exposed iSCSI disk; and streaming the second snapshot of the exposed iSCSI disk to create a save set in a virtual disk file on a backup medium.

Claims

1. A method for excluding files from a backup image file during a backup operation, comprising:

determining files to be excluded from the backup image;

taking a first snapshot of a source volume;

exposing an iSCSI (Internet Small Computer System Interface) disk with the first snapshot being an iSCSI target;

creating a read/write differencing disk for the exposed iSCSI disk;

deleting files to be excluded from the exposed iSCSI disk, wherein the deleting of the files comprises recording the deletion to the differencing disk;

taking a second snapshot of the exposed iSCSI disk; and

streaming the second snapshot of the exposed iSCSI disk to create a save set in a virtual disk file on a backup medium.

2. The method of claim 1, wherein a list comprising the files to be excluded comprises a list of VSS (Volume Shadow Copy Service) writer names or GUIDs (Globally Unique Identifiers), a user-defined file list, a predefined exclusion specification, or any combination thereof.

3. The method of claim 1, wherein the first and second snapshots are VSS (Volume Shadow Copy Service) snapshots and are contained in virtual disk files.

4. The method of claim 1, wherein the virtual disk file is mountable.

5. The method of claim 1, wherein the virtual disk file is one of a VHD (Virtual Hard Disk) file, a VHDx file, or a VMDK (Virtual Machine Disk) file.

6. The method of claim 1, wherein the deleting of the files comprises utilizing a native file system API (Application Program Interface) of an OS (Operating System).

7. A non-transitory machine-readable medium having instructions stored therein which, when executed by a processor, cause the processor to perform backup operations, the operations comprising:

determining files to be excluded from the backup image;

taking a first snapshot of a source volume;

exposing an iSCSI (Internet Small Computer System Interface) disk with the first snapshot being an iSCSI target;

creating a read/write differencing disk for the exposed iSCSI disk;

deleting files to be excluded from the exposed iSCSI disk, wherein the deleting of the files comprises recording the deletion to the differencing disk;

taking a second snapshot of the exposed iSCSI disk; and

streaming the second snapshot of the exposed iSCSI disk to create a save set in a virtual disk file on a backup medium.

8. The non-transitory machine-readable medium of claim 7, wherein a list comprising the files to be excluded comprises a list of VSS (Volume Shadow Copy Service) writer names or GUIDs (Globally Unique Identifiers), a user-defined file list, a predefined exclusion specification, or any combination thereof.

9. The non-transitory machine-readable medium of claim 7, wherein the first and second snapshots are VSS (Volume Shadow Copy Service) snapshots and are contained in virtual disk files.

10. The non-transitory machine-readable medium of claim 7, wherein the virtual disk file is mountable.

11. The non-transitory machine-readable medium of claim 7, wherein the virtual disk file is one of a VHD (Virtual Hard Disk) file, a VHDx file, or a VMDK (Virtual Machine Disk) file.

12. The non-transitory machine-readable medium of claim 7, wherein the deleting of the files comprises utilizing a native file system API (Application Program Interface) of an OS (Operating System).

13. A data processing system, comprising:

a processor; and

a memory coupled to the processor storing instructions which, when executed by the processor, cause the processor to perform backup operations, the operations including

determining files to be excluded from the backup image;

taking a first snapshot of a source volume;

exposing an iSCSI (Internet Small Computer System Interface) disk with the first snapshot being an iSCSI target;

creating a read/write differencing disk for the exposed iSCSI disk;

deleting files to be excluded from the exposed iSCSI disk, wherein the deleting of the files comprises recording the deletion to the differencing disk;

taking a second snapshot of the exposed iSCSI disk; and

streaming the second snapshot of the exposed iSCSI disk to create a save set in a virtual disk file on a backup medium.

14. The data processing system of claim 13, wherein a list comprising the files to be excluded comprises a list of VSS (Volume Shadow Copy Service) writer names or GUIDs (Globally Unique Identifiers), a user-defined file list, a predefined exclusion specification, or any combination thereof.

15. The data processing system of claim 13, wherein the first and second snapshots are VSS (Volume Shadow Copy Service) snapshots and are contained in virtual disk files.

16. The data processing system of claim 13, wherein the virtual disk file is mountable.

17. The data processing system of claim 13, wherein the virtual disk file is one of a VHD (Virtual Hard Disk) file, a VHDx file, or a VMDK (Virtual Machine Disk) file.

18. The data processing system of claim 13, wherein the deleting of the files comprises utilizing a native file system API (Application Program Interface) of an OS (Operating System).