Data storage system utilizing proxy device for storage operations

• US 9,898,371 B2
• Filed: 02/03/2016
• Issued: 02/20/2018
• Est. Priority Date: 03/07/2012
• Status: Active Grant

• Current Assignee: CommVault Systems Incorporated
• Original Assignee: CommVault Systems Incorporated
• Inventors: Kumarasamy, Paramasivam, Nallathambi, Vimal Kumar, Zakharkin, Dmitriy Borisovich
• Primary Examiner(s): Chau, Dung K
• Application Number:
  US15/014,422
• Publication Number:
  US 20160154707A1
• Time in Patent Office: 748 Days
• Field of Search: 707649, 707640, 707692, 707705, 707736, 707822
• CPC Class Codes: G06F 11/1451 by selection of backup contents
• CPC Class Codes: G06F 16/128 Details of file system snapshots on the file-level, e.g. snapshot creation, administration, deletion use of snapshots for error detection or correction G06F11/14, G06F11/16
• CPC Class Codes: G06F 16/13 File access structures, e.g. distributed indices arrangements of input from, or output to, record carriers G06F3/06
• CPC Class Codes: G06F 16/134 Distributed indices
• CPC Class Codes: G06F 16/1748 De-duplication implemented within the file system, e.g. based on file segments de-duplication techniques in storage systems for the management of data blocks G06F3/0641
• CPC Class Codes: G06F 16/188 Virtual file systems
• CPC Class Codes: G06F 16/22 Indexing; Data structures therefor; Storage structures
• CPC Class Codes: G06F 2009/45583 Memory management, e.g. access or allocation
• CPC Class Codes: G06F 2201/84 Using snapshots, i.e. a logical point-in-time copy of the data
• CPC Class Codes: G06F 9/45558 Hypervisor-specific management and integration aspects

Abstract

A data storage environment can include one or more virtual clients instantiated on a host proxy computing device. The virtual clients may have only indirect access to a storage device, and my access the storage device via the proxy computing device. For example, the proxy computing device receives storage operation requests from one of the virtual clients, such as a request to create, mount or revert a snapshot of virtual client data. The proxy computing device generally acts as an intermediary between the virtual clients and the storage device to carry out the snapshots or other storage operations. The proxy computing device may further receive a notification upon completion of the storage operations, and transmits relevant data to the requesting virtual client regarding the storage operation.

Claims

1. A method for creating a snapshot of a data store associated with a virtual machine using a host computing device on which the virtual machine resides, the method comprising:

receiving a snapshot request at the host computing device, the host computing device comprising;

one or more processors,

one or more data stores,

a virtual machine instantiated on the host computing device using the one or more processors and configured to execute an operating system,

the virtual machine comprising a virtual data agent configured to manage backup storage operations of the virtual machine, and a virtual data store instantiated using the one or more data stores, the virtual data store comprising primary data generated by at least one application executing on the virtual machine,

a virtual machine manager configured to manage the virtual machine, and

a data agent configured to manage backup storage operations of the host computing device,

wherein the snapshot request comprises a request by the virtual data agent of the virtual machine to create a snapshot copy of at least a portion of the virtual data store of the virtual machine, and wherein the host computing device forms part of a networked storage system comprising at least one storage device that is configured to take snapshots representing copies of data;

forwarding, by the host computing device, the snapshot request to the storage device, wherein a snapshot of the at least a portion of the virtual data store is created on the storage device in response to the snapshot request;

receiving, at the host computing device, a snapshot identifier associated with the snapshot; and

forwarding the snapshot identifier to the virtual machine by the host computing device.

2. The method of claim 1, wherein the snapshot is a hardware snapshot, that is created in a self-contained manner by the storage device.

3. The method of claim 1, further comprising:

receiving, at the host computing device, a snapshot retrieval request from the virtual machine to retrieve the snapshot from the storage device, the request including the snapshot identifier;

forwarding the snapshot retrieval request from the host computing device to the storage device on behalf of the virtual machine;

receiving snapshot location information from the storage device by the host computing device, the snapshot location information indicative of a location of the snapshot on the storage device; and

forwarding the received snapshot location information from the host computing device to the virtual machine.

4. The method of claim 1, further comprising:

receiving, at the host computing device, a reversion request from the virtual machine to revert the data store associated with the virtual machine to a previous state represented by a previously created snapshot of the data store;

forwarding the reversion request from the host computing device to the storage device on behalf of the virtual machine;

receiving, at the host computing device, a notification that the storage device has reverted the data store associated with the virtual machine to the previous state; and

forwarding the notification from the host computing device to the virtual machine.

5. The method of claim 1, wherein the virtual machine is not in direct communication with the storage device and is in only indirect communication with the storage device via the host computing device.

6. The method of claim 1, wherein the virtual machine does not have direct access to the storage device and only indirectly accesses the storage device via the host computing device.

7. The method of claim 1, wherein, at the time the snapshot is created, a first copy of the data store exists on the storage device that represents a version of the data at a first point-in-time, and wherein the snapshot is created using the first copy and reflects a version of the data at a second point-in-time later than the first point-in-time.

8. A data storage system, comprising:

a host computing device comprising one or more processors and at least one data store;

a virtual machine instantiated on the host computing device and executing on the one or more processors,

wherein the virtual machine is instantiated using the one or more processors, and wherein the virtual machine comprises a virtual data agent configured to manage backup storage operations of the virtual machine and a virtual data store comprising primary data generated by at least one application executing on the virtual machine, wherein the virtual data store corresponds to at least a portion of at least one data store of the one or more data stores; and

a virtual machine manager configured to manage the use of the one or more processors and the one or more data stores by the virtual machine,

wherein the at least one data store stores at least a portion of the primary data,

wherein the virtual machine is configured to request performance of a storage operation of at least a portion of the primary data, and

wherein the host computing device is configured to act as a proxy between the virtual machine and at least one storage device by forwarding the request to the at least one storage device on behalf of the virtual machine, wherein the at least one storage device performs the storage operation in response to the forwarded request.

9. The data storage system of claim 8, wherein the primary data comprises one or more files or directories.

10. The data storage system of claim 8, wherein at least some of the one or more data stores reside on a common storage device.

11. The data storage system of claim 8, wherein, following completion of the requested storage operation, the at least one storage device transmits a copy identifier corresponding to the requested storage operation to the host computing device.

12. The data storage system of claim 8, wherein the at least one storage device is configured to create hardware snapshots in response to the forwarded request in a self-contained manner without substantial involvement from software or hardware external to the at least one storage device.

13. The data storage system of claim 8, wherein the virtual machines is not in direct communication with the at least one storage device and are in only indirect communication with the storage device via the host computing device.

14. The data storage system of claim 8, wherein the virtual machine does not have direct access the at least one storage device and only indirectly access the at least one storage device via the host computing device.

15. A method for performing a data storage operation associated with a virtual machine and using a host computing device on which the virtual machine resides, the method comprising:

receiving a storage operation request at a host computing device having a virtual machine instantiated thereon, the virtual machine comprising a virtual data agent configured to manage backup storage operations of the virtual machine and a virtual data store comprising primary data generated by at least one application executing on the virtual machine, the virtual data store corresponding to at least a portion of at least one data store of one or more data stores of the host computing device,

the host computing device forming part of a networked storage system comprising at least one storage device to perform the storage operation, and

the storage operation request comprising a request from the virtual data agent of the virtual machine to perform the storage operation on at least a portion of the primary data; and

forwarding, by the host computing device, the storage operation request to the storage device on behalf of the virtual machine, wherein the storage device performs the storage operation in response to the request.

16. The method of claim 15, wherein the requested storage operation comprises a backup operation.

17. The method of claim 15, wherein the requested storage operation comprises a snapshot operation.

18. The method of claim 15, wherein the requested storage operation comprises an archive operation.