Hypervisor-independent block-level live browse for access to backed up virtual machine (VM) data and hypervisor-free file-level recovery (block- level pseudo-mount)

Patent metadata

Field	Value
Publication number	US-11436038-B2
Application number	US-202017027439-A
Country	US
Kind code	B2
Filing date	Sep 21, 2020
Priority date	Mar 9, 2016
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

Hypervisor-independent block-level live browse is used for directly accessing backed up virtual machine (VM) data. Hypervisor-free file-level recovery (block-level pseudo-mount) from backed up VMs also is disclosed. Backed up virtual machine (“VM”) data can be browsed without needing or using a hypervisor. Individual backed up VM files can be requested and restored to anywhere without a hypervisor and without the need to restore the rest of the backed up virtual disk. Hypervisor-agnostic VM backups can be browsed and recovered without a hypervisor and from anywhere, and individual backed up VM files can be restored to anywhere, e.g., to a different VM platform, to a non-VM environment, without restoring an entire virtual disk, and without a recovery data agent at the destination.

First claim

What is claimed is:

1. A system comprising:
a first computing device comprising one or more hardware processors,
wherein the first computing device is communicatively coupled to a storage device that comprises a secondary copy of virtual-machine data,
wherein the virtual-machine data was backed up from a virtual disk of a virtual machine executing on an other computing device distinct from the first computing device, and
wherein the secondary copy comprises (i) a catalogue of a virtual machine file system for the virtual machine at the other computing device, and (ii) data blocks backed up from the virtual disk; and

wherein the first computing device is configured to:
execute at least a first file system, a pseudo-disk driver, and a media agent,
host a pseudo-disk created by the pseudo-disk driver,
mount to the first computing device, the pseudo-disk created by the pseudo-disk driver as a block data storage device,
receive a request to browse the secondary copy,
by the pseudo-disk driver, retrieve the catalogue of the virtual machine file system from the secondary copy and store the catalogue into the pseudo-disk,
by the first file system without using a hypervisor to interpret the catalogue, enumerate the catalogue of the virtual machine file system and transmit the catalogue to the media agent, and
by the media agent, transmit at least part of the catalogue as enumerated by the first file system, in response to the request to browse the secondary copy.

2. The system of claim 1 , wherein the first computing device is further configured to: by the pseudo-disk driver, intercept read requests directed to the pseudo-disk.

3. The system of claim 1 , wherein the first computing device is further configured to: by the pseudo-disk driver, locate the catalogue of the virtual machine file system on the storage device based on an index at the first computing device, wherein the index was populated at least in part when the secondary copy was stored to the storage device.

4. The system of claim 1 , wherein the first computing device is further configured to: by the pseudo-disk driver, use an index at the first computing device to locate the catalogue of the virtual machine file system on the storage device, wherein the index was populated at least in part when the secondary copy was stored to the storage device.

5. The system of claim 1 , wherein the request to browse the secondary copy of virtual-machine data is responded to from the first computing device without using a hypervisor.

6. The system of claim 1 , wherein the secondary copy was created without hypervisor-specific metadata from the virtual disk of the virtual machine.

7. The system of claim 1 , wherein when the virtual disk of the virtual machine was backed up, hypervisor-specific metadata from the virtual disk was stored separately from the secondary copy.

8. The system of claim 1 , wherein the first computing device is further configured to:
receive a request at the media agent to restore a first file that was backed up from the virtual disk of the virtual machine,
by the pseudo-disk driver, retrieve first data blocks belonging to the first file from the secondary copy and into the pseudo-disk,
at least in part using the media agent, restore the first file from the first data blocks based on information about the first file in the catalogue of the virtual machine file system as enumerated by the first file system; and
wherein the first file is restored by the first computing device without using a hypervisor.

9. The system of claim 1 , wherein live browse of and file-level recovery from the secondary copy are performed without a hypervisor.

10. The system of claim 1 , wherein live browse of and file-level recovery from the secondary copy are performed without a hypervisor, based on using the secondary copy, which was created without hypervisor-specific metadata from the virtual disk of the virtual machine.

11. A method comprising:
by a first computing device comprising one or more hardware processors,
wherein the first computing device is communicatively coupled to a storage device that comprises a secondary copy of virtual-machine data,
wherein the virtual-machine data was backed up from a virtual disk of a virtual machine executing on an other computing device distinct from the first computing device, and
wherein the secondary copy comprises (i) a catalogue of a virtual machine file system for the virtual machine at the other computing device, and (ii) data blocks backed up from the virtual disk:
executing at least a first file system, a pseudo-disk driver, and a media agent;
hosting a pseudo-disk created by the pseudo-disk driver;
mounting to the first computing device, the pseudo-disk created by the pseudo-disk driver as a block data storage device;
receiving a request to browse the secondary copy;
by the pseudo-disk driver, retrieving the catalogue of the virtual machine file system from the secondary copy and storing the catalogue into the pseudo-disk;
by the first file system without using a hypervisor to interpret the catalogue, enumerating the catalogue of the virtual machine file system and transmitting the catalogue to the media agent; and
by the media agent, transmitting at least part of the catalogue as enumerated by the first file system, in response to the request to browse the secondary copy.

12. The method of claim 11 further comprising: by the pseudo-disk driver, intercepting read requests directed to the pseudo-disk.

13. The method of claim 11 further comprising: by the pseudo-disk driver, locating the catalogue of the virtual machine file system on the storage device based on an index at the first computing device, wherein the index was populated at least in part when the secondary copy was stored to the storage device.

14. The method of claim 11 further comprising: by the pseudo-disk driver, using an index at the first computing device to locate the catalogue of the virtual machine file system on the storage device, wherein the index was populated at least in part when the secondary copy was stored to the storage device.

15. The method of claim 11 , wherein the request to browse the secondary copy of virtual-machine data is responded to from the first computing device without using a hypervisor.

16. The method of claim 11 , wherein the secondary copy was created without hypervisor-specific metadata from the virtual disk of the virtual machine.

17. The method of claim 11 , wherein when the virtual disk of the virtual machine was backed up, hypervisor-specific metadata from the virtual disk was stored separately from the secondary copy.

18. The method of claim 11 further comprising:
receiving a request at the media agent to restore a first file that was backed up from the virtual disk of the virtual machine,
by the pseudo-disk driver, retrieving first data blocks belonging to the first file from the secondary copy and into the pseudo-disk,
at least in part using the media agent, restoring the first file from the first data blocks based on information about the first file in the catalogue of the virtual machine file system as enumerated by the first file system; and
wherein the first file is restored by the first computing device without using a hypervisor.

19. The method of claim 11 , further comprising one or more of: live browsing the secondary copy without a hypervisor, and performing file-level recovery from the secondary copy without a hypervisor.

20. The method of claim 11 , wherein based on usi

Assignees

• Commvault Systems Inc

Inventors

• Dornemann Henry Wallace
• Pawar Rahul S
• Mitkar Amit
• Gutta Sunil Kumar
• Degaonkar Sumedh Pramod
• Chen Jianwei

Classifications

• G06F11/1438 Primary

  Restarting or rejuvenating · CPC title

• G06F3/065

  Replication mechanisms · CPC title

• G06F11/1484

  involving virtual machines · CPC title

• G06F2009/45583

  Memory management, e.g. access or allocation · CPC title

• G06F11/1469

  Backup restoration techniques · CPC title