Systems and methods for sharing media and path management in a computer network

• US 8,341,359 B2
• Filed: 10/03/2011
• Issued: 12/25/2012
• Est. Priority Date: 04/03/2003
• Status: Active Grant

• Current Assignee: CommVault Systems Incorporated
• Original Assignee: CommVault Systems Incorporated
• Inventors: Kottomtharayil, Rajiv, Gokhale, Parag, Prahlad, Anand, Retnamma, Manoj, Ngo, David, Devassy, Varghese
• Primary Examiner(s): ELMORE, STEPHEN C
• Application Number:
  US13/251,941
• Publication Number:
  US 20120030432A1
• Time in Patent Office: 449 Days
• Field of Search: 711/147, 711/4, 711/118, 711/119, 711/202, 711/220, 709/219, 709/231, 709/239, 710/38
• 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 method of dynamically sharing a media volume in a network includes associating a first media management module with a first media volume of a first storage device, associating a second media management module with the first media volume, the second media management module mounting the media volume and creating an access path to the media volume, and delegating management of the created access path to the second media management module.

Claims

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

a storage manager module executing on a computing device;

a first media management module executing in one or more computer processors communicatively coupled to a media volume and the storage manager module;

a second media management module executing in one or more computer processors communicatively coupled to the media volume and the storage manager module;

wherein the storage manager module is programmed to;

identify a first media management module for deactivation with respect to the media volume, and

identify a second media management module for activation with respect to the media volume;

shift control of the first media volume from the first media management module to the second media management module by deactivating the first media management module and activating the second media management module wherein the second media management module mounts the media volume and creates an access path to the media volume; and

wherein the access path is stored by the second media management module.

2. The system of claim 1, wherein the storage manager is further configured to determine an availability of the second media management module.

3. The system of claim 2, wherein the storage manager is configured to identify the second media management module according to said availability.

4. The system of claim 2, wherein said availability is indicative of an available bandwidth of a network path to the second media management module.

5. The system of claim 1, wherein an association between the second media management module and the media volume comprises at least one of an index entry and an access path.

6. The system of claim 1, wherein the media volume is on a magnetic media.

7. The system of claim 1, 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.

8. The system of claim 1, wherein the first and second media management modules execute on different computing devices.

9. The system of claim 1, wherein the media volume is part of a storage area network (SAN).

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

forming a first association between a first media management module and a first media volume of a first storage device;

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

forming a second association between the second media management module and the first media volume;

shifting control with one or more computer processors of the first media volume from the first media management module to the second media management module by deactivating the first media management module and activating the second media management module wherein the second media management module mounts the media volume and creates an access path to the media volume; and

wherein the access path is stored by the second media management module.

11. The method of claim 10, wherein said determining is performed by a storage manager module.

12. The method of claim 10, wherein said determining the availability comprises determining a workload of the second media management module.

13. The method of claim 10, further comprising a volume sharing request initiated by a client device in network communication with a storage manager module.

14. The method of claim 10, wherein the first media management module executes a listening process for detecting an instruction to reassume an activated state.

15. The method of claim 10, 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.