Systems and methods for sharing media in a computer network

• US 8,032,718 B2
• Filed: 07/21/2010
• Issued: 10/04/2011
• Est. Priority Date: 04/03/2003
• Status: Active Grant

• Current Assignee: CommVault Systems Incorporated
• Original Assignee: CommVault Systems Incorporated
• Inventors: Devassy, Varghese, Gokhale, Parag, Ngo, David, Vijayan Retnamma, Manoj Kumar, Prahlad, Anand, Kottomtharayil, Rajiv
• Primary Examiner(s): Elmore; Stephen C
• Application Number:
  US12/840,561
• Publication Number:
  US 20100287234A1
• Time in Patent Office: 440 Days
• Field of Search: 711/147, 711/118, 711/119, 711/202, 711/220, 709/219, 709/231
• US Class Current: 711/147
• CPC Class Codes: G06F 11/1448 Management of the data involved in backup or backup restore
• CPC Class Codes: G06F 11/1464 for networked environments
• CPC Class Codes: G06F 11/1469 Backup restoration techniques
• CPC Class Codes: G06F 16/2228 Indexing structures
• CPC Class Codes: G06F 16/951 Indexing; Web crawling techniques
• CPC Class Codes: G06F 3/0617 in relation to availability
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/0635 by changing the path, e.g. traffic rerouting, path reconfiguration
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/0655 Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: Y10S 707/99953 Recoverability
• CPC Class Codes: Y10S 707/99955 Archiving or backup

Abstract

A computerized method for sharing removable storage media in a network, the method comprising associating, in an index entry, a first piece of removable storage media in a first storage device with at least a first storage policy copy and a second storage policy copy; copying, to the first piece of removable storage media, data associated with the first storage policy copy; and copying, to the first piece of removable storage media, data associated with the second storage policy copy.

Claims

1. A method for dynamically sharing a media volume in a network, the method comprising:

instructing, in response to a volume sharing request, removal of a first association between a first media management module and a media volume;

determining with one or more computer processors an availability of a second media management module different than the first media management module;

instructing formation of a second association between the second media management module and the media volume, wherein removal of the first association deactivates the first media management module and wherein formation of the second association activates the second media management module so that the control of the media volume shifts to the second media management module;

storing in a first index with one or more computer processors a first access path to the media volume, the first index being maintained by the second media management module; and

storing in a second index with one or more computer processors a second access path to the media volume, the second index being maintained by a storage manager module executing on a computing device.

2. The method of claim 1, wherein said determining is performed by the storage manager module.

3. The method of claim 2, wherein said acts of instructing are performed by the storage manager module.

4. The method of claim 1, wherein said determining the availability comprises determining a workload of the second media management module.

5. The method of claim 1, wherein said volume sharing request is initiated by the storage manager module.

6. The method of claim 1, wherein said volume sharing request is initiated by a client device in network communication with the storage manager module.

7. The method of claim 1, wherein said instructing removal of the first association comprises directing the first media management module to assume a deactivated state with respect to the media volume.

8. The method of claim 7, wherein said directing the first media management module comprises directing the first media management module to execute a listening process for detecting an instruction to reassume an activated state.

9. The method of claim 1, wherein said first and second associations allow access by, respectively, the first and second media management modules to the same data stored in the media volume.

10. A system for dynamically sharing a media volume in a network, the system comprising:

a storage manager module executing on a computing device;

a first media management module communicatively coupled to a media volume and the storage manager module;

a second media management module communicatively coupled to the media volume and the storage manager module;

wherein the storage manager module is programmed to;

instruct the termination of a first association between the first media management module and the media volume, and

instruct the formation of a second association between the second media management module and the media volume;

a first index associated with the second media management module, the first index storing data relating to the second association between the second media management module and the media volume; and

a second index associated with the storage manager module, the second index storing data relating to the second association between the second media management module and the media volume.

11. The system of claim 10, wherein the storage manager is further configured to determine an availability of the second media management module.

12. The system of claim 11, wherein the storage manager is configured to instruct the formation of the second association according to said availability.

13. The system of claim 11, wherein said availability is indicative of an available bandwidth of a network path to the second media management module.

14. The system of claim 10, wherein the second association between the second media management module and the media volume comprises at least one of an index entry and an access path.

15. The system of claim 10, wherein the media volume is on a magnetic media.

16. The system of claim 10, wherein the first and second media management modules are coupled to the media volume such that only one of the first and second media management modules is configured to control the media volume at a particular time.

17. The system of claim 10, wherein the first and second media management modules execute on different computing devices.

18. The system of claim 10, wherein the media volume is part of a storage area network (SAN).

19. A system for dynamically sharing media in a network, the system comprising:

first means for (i) instructing, in response to a volume sharing request, removal of a first association between a first media management module and a storage media, (ii) determining an availability of a second media management module different than the first media management module, and (iii) instructing formation of a second association between the second media management module and the storage media;

second means for storing a first access path to the storage media, said means for storing the first access path being maintained by said second media management module; and

third means for storing a second access path to the storage media, said means for storing the second access path being maintained by said first means.

20. The system of claim 19, wherein said first means, said first media management module and said second media management module execute on separate computing devices on a network.