Data storage system utilizing proxy device for storage operations

• US 9,298,715 B2
• Filed: 03/06/2013
• Issued: 03/29/2016
• 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:
  US13/787,609
• Publication Number:
  US 20130238562A1
• Time in Patent Office: 1,119 Days
• Field of Search: None
• US Class Current: 1/1
• 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 may 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 proxy computing device on which the virtual machine resides, the method comprising:

receiving a snapshot request at the proxy computing device, the proxy computing device having;

one or more processors,

one or more data stores,

a plurality of virtual machines instantiated on the proxy computing device, each of the plurality of virtual machines configured to execute an operating system of the respective virtual machine, wherein the plurality of virtual machines are instantiated using the one or more processors,

each of the plurality of virtual machines comprising a virtual data store comprising primary data generated by at least one application executing on the respective virtual machine, wherein the virtual data stores of the plurality of virtual machines share the one or more data stores, and a virtual data agent configured to manage backup storage operations of the respective virtual machine,

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

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

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

forwarding, by the data agent of the proxy computing device, the snapshot request to the storage device on behalf of the first virtual machine, wherein a point-in-time snapshot of the portion of the virtual data store is created on the storage device in response to the snapshot request;

receiving, at the proxy computing device, a snapshot identifier associated with the point-in-time snapshot; and

forwarding the snapshot identifier to the first virtual machine by the proxy computing device.

2. The method of claim 1, wherein the point-in-time 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 proxy computing device, a snapshot retrieval request from the first virtual machine to retrieve the snapshot from the storage device, the snapshot retrieval request including the snapshot identifier;

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

receiving, at the proxy computing device, snapshot location information from the storage 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 proxy computing device to the first virtual machine.

4. The method of claim 1, further comprising:

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

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

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

forwarding the notification from the proxy computing device to the first virtual machine.

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

6. The method of claim 1, wherein the first virtual machine does not have direct access to the storage device and only indirectly accesses the storage device via the proxy 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 one or more data stores;

a plurality of virtual machines instantiated on the host computing device and executing on the one or more processors,

wherein a first virtual machine of the plurality of virtual machines is configured to execute an operating system and is instantiated using the one or more processors, and wherein the first virtual machine includes a virtual data store comprising primary data generated by at least one application executing on the first 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 data agent configured to manage backup storage operations of the first virtual machine; 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 plurality of virtual machines,

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

wherein the first 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 first virtual machine and at least one storage device by forwarding the request to the at least one storage device on behalf of the first 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 and/or directories.

10. The data storage system of claim 8, wherein the at least one storage device comprises the at least one data store.

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

12. The data storage system of claim 8, wherein the storage operation comprises a point-in-time copy operation and the at least one storage device is configured to generate 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 plurality of virtual machines are 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 plurality of virtual machines do not have direct access to 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 proxy computing device on which the virtual machine resides, the method comprising:

receiving a storage operation request at a proxy computing device having at least one virtual machine instantiated thereon, the at least one virtual machine configured to execute an operating system and including a virtual data store comprising primary data generated by at least one application executing on the at least one 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 proxy computing device, and a virtual data agent configured to manage backup storage operations of the at least one virtual machine,

the proxy 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 at least one virtual machine to perform the storage operation on at least a portion of the primary data; and

forwarding, using a data agent of the proxy computing device, the storage operation request to the at least one storage device on behalf of the at least one virtual machine, wherein the at least one storage device performs the storage operation in response to the request.

16. The method of claim 15, wherein the storage operation comprises at least one of a backup operation or a snapshot operation.

17. The method of claim 15, wherein the at least one storage device comprises the at least one data store.

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