Leveraging continuous replication to copy snapshot backup image

• US 10,452,286 B2
• Filed: 02/17/2016
• Issued: 10/22/2019
• Est. Priority Date: 02/17/2016
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Quest Software, Inc.
• Inventors: Thiam, Alioune
• Primary Examiner(s): Dudek, Jr., Edward J
• Application Number:
  US15/045,545
• Publication Number:
  US 20170235506A1
• Time in Patent Office: 1,343 Days
• CPC Class Codes: G06F 11/14 Error detection or correction of the data by redundancy in operation G06F11/16 takes precedence
• CPC Class Codes: G06F 11/1448 Management of the data involved in backup or backup restore
• 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
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/0665 at area level, e.g. provisioning of virtual or logical volumes
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]

Abstract

Systems, methods and devices provide efficient data protection by creating backup images of snapshots using the replication capabilities of the data protection system. The snapshots are point-in-time representation of a data set, where the snapshots allows recoverable states of the data set without having to make a complete copy. A snapshot to be backed up is stored in a primary volume. A virtual volume is created, the virtual volume comprising references, such as pointers, to the snapshot data stored in the primary volume. The snapshot data referenced by the virtual volume is then replicated using the replication capabilities of the data protection system. In this manner, the replication of the snapshot does not burden the primary volume that is hosting the snapshot storage.

Claims

1. An Information Handling System (IHS), comprising:

a processor; and

a memory coupled to the processor, the memory comprising program instructions stored thereon that, upon execution by the processor, cause the IHS to;

store enterprise data in a primary volume;

store a plurality of snapshots referring to the enterprise data in the primary volume;

receive a command to replicate the plurality of snapshots separately from the enterprise data;

create a virtual volume in response to the command, wherein the virtual volume comprises pointers to the plurality of snapshots; and

replicating the plurality of snapshots to a first snapshot backup image volume and to a second snapshot backup image volume, wherein the plurality of snapshots at the first snapshot backup image volume is accessed by a client device in response to a determination that the client device can access the first snapshot backup image volume more efficiently than the client device can access the second snapshot backup image volume.

2. The IHS of claim 1, wherein the primary volume is replicated to one or more target volumes.

3. The IHS of claim 2, wherein the primary volume is replicated by a replication system of the data protection system.

4. The IHS of claim 3, wherein the virtual volume is replicated by the replication system of the data protection system.

5. The IHS of claim 4, wherein the virtual volume is replicated to a snapshot backup image volume.

6. The IHS of claim 1, wherein the primary volume and the virtual volume are within the same storage device.

7. The IHS of claim 1, wherein the program instructions, upon execution, further cause the IHS to:

monitor for completion of the replication of the virtual volume; and

discontinue replication of the virtual volume upon completion.

8. The IHS of claim 7, wherein the program instructions, upon execution, further cause the IHS to:

delete the virtual volume upon completion.

9. The IHS of claim 1, wherein a first snapshot data is stored to the primary volume in response to a command triggering the generation of the snapshot at a first time and wherein a second snapshot data is stored to the primary volume in response to a command triggering the generation of the snapshot at a second time.

10. The IHS of claim 9, wherein the program instructions, upon execution, further cause the IHS to:

delete replicated snapshot data corresponding to snapshots generated between the first time and the second time.

11. A method, comprising:

storing enterprise data in a primary volume using a first controller of an Information Handling System (IHS);

storing a plurality of snapshots referring to the enterprise data in the primary volume using the first controller;

receiving, via the first controller a command to backup the plurality of snapshots separately from the enterprise data;

creating, using a second controller of the HIS, a virtual volume in response to the command from the first controller, wherein the virtual volume comprises pointers to the plurality of snapshots; and

replicating the plurality of snapshots using the pointers, via the second controller, to a first snapshot backup image volume and to a second snapshot backup image volume, wherein the plurality of snapshots at the first snapshot backup image volume is accessed by a client device in response to a determination that the client device can access the first snapshot backup image volume more efficiently than the client device can access the second snapshot backup image volume.

12. The method of claim 11, wherein the primary volume is replicated to two or more target volumes.

13. The method of claim 12, and wherein the virtual volume is replicated by the replication system of the data protection system.

14. The method of claim 13, wherein the virtual volumes is replicated to a snapshot backup image volume.

15. The method of claim 11, wherein the virtual volume is a component of the source storage.

16. The method of claim 11, further comprising:

monitoring for completion of the replication of the virtual volume; and

discontinuing replication of the virtual volume upon completion.

17. The method of claim 16, further comprising:

deleting the virtual volume upon completion.

18. The method of claim 11, wherein a first snapshot data is stored to the primary volume in response to a command triggering the generation of the snapshot at a first time and wherein a second snapshot data is stored to the primary volume in response to a command triggering the generation of the snapshot at a second time.

19. The method of claim 18, further comprising:

deleting replicated snapshot data corresponding to snapshots generated between the first time and the second time.

20. A hardware memory device having program instructions stored thereon that, upon execution by a processor of an Information Handling System (IHS), cause the IHS to:

store enterprise data in a primary volume;

store a plurality of snapshots referring to the enterprise data in the primary volume;

receive a command to backup the plurality of snapshots separately from the enterprise data;

create a virtual volume in response to the command, wherein the virtual volume comprises pointers to the plurality of snapshots; and

replicating the plurality of snapshots directly from the primary volume using the pointers, to a first snapshot backup image volume and to a second snapshot backup image volume, wherein the plurality of snapshots at the first snapshot backup image volume is accessed by a client device in response to a determination that the client device can access the first snapshot backup image volume more efficiently than the client device can access the second snapshot backup image volume.