System and method for virtual vaulting

• US 7,487,009 B2
• Filed: 12/06/2005
• Issued: 02/03/2009
• Est. Priority Date: 03/12/2003
• Status: Active Grant

• Current Assignee: NetApp, Inc.
• Original Assignee: NetApp, Inc.
• Inventors: Stager, Roger, Johnston, Craig Anthony, Trimmer, Don Alvin, Blaser, Rico
• Primary Examiner(s): Crawford; Gene O.
• Assistant Examiner(s): BURGESS, RAMYA PRAKASAM
• Application Number:
  US11/294,955
• Publication Number:
  US 20060074520A1
• Time in Patent Office: 1,155 Days
• Field of Search: 700/214, 700/215, 711/111, 711/112, 711/113, 711/115
• US Class Current: 700/214
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0632 by initialisation or re-initialisation of storage systems
• CPC Class Codes: G06F 3/0686 Libraries, e.g. tape libraries, jukebox
• CPC Class Codes: G11B 15/68 Automatic cassette changing arrangements; automatic tape changing arrangements

Abstract

The present invention is a tape library comprising both a small front-end portion and a larger back-end portion. The front-end portion is a visible virtual or physical tape library; and the back-end portion is a large invisible virtual or physical tape vault. The DPA is a typical DPA which only sees the front-end library. If desired, all messages regarding the importing and exporting of tapes are reviewed by an agent. The agent manages the automatic transfer of tapes between the front-end and the back-end, and notifies the user when a manual import or export is needed. This greatly reduces both the amount of hardware required to establish a virtual or physical tape library and also reduces the amount of labor required by a user to physically import and export tapes. If both the front-end library and the back-end vault are virtual and reside on the same virtual tape library appliance, no data movement is necessary and the tapes can be moved merely by performing small software state changes. In this case, manual operation may be acceptable.

Claims

1. A storage system comprising:

a front-end portion configured to store at least one tape;

a data protection application running on the front-end portion;

a back-end portion configured to store tapes exported from the front-end portion; and

an agent configured to intercept messages sent by the data protection application;

wherein in response to the agent intercepting a message from the data protection application requesting an end user to manually import a tape located in the back-end portion, the agent automatically transfers the tape to the front-end portion from the back-end portion without forwarding the intercepted message.

2. The storage system of claim 1 wherein the front-end portion is a tape library.

3. The storage system of claim 1 wherein the back-end portion is a tape vault.

4. The storage system of claim 1 wherein the data protection application is unaware of the back-end portion.

5. The storage system of claim 1 wherein in response to the agent intercepting a message from the data protection application requesting an end user to manually export a tape from the front-end portion, the agent transfers the tape to an empty space in the back-end portion without forwarding the intercepted message.

6. The storage system of claim 1 wherein the front-end portion is one of a plurality of front-end portions that share the back-end portion.

7. A method for managing the transfer of tapes in a storage system having at least one front-end portion and a back-end portion, the method comprising the steps of:

intercepting a message sent from a data protection application to an operator requesting a tape be manually imported to a front-end portion of a tape library;

determining whether the requested tape is located in a back-end portion of the tape library;

importing the requested tape volume from the back-end portion to the front-end portion where the determination is positive; and

forwarding the intercepted message along to the operator where the determination is negative.

8. The method of claim 7 wherein the front-end portion is a tape library.

9. The method of claim 7 wherein the back-end portion is a tape vault.

10. The method of claim 7 wherein the data protection application is running on the front-end portion and is unaware of the existence of the back-end portion.

11. The method of claim 7 wherein the front-end portion is a one of a plurality of front-end portions that share the back-end portion.

12. The method of claim 7 further comprising the steps of:

intercepting a message sent from a data protection application to an operator requesting a tape be manually exported from a front-end portion of a tape library;

determining whether the requested tape may be stored in a back-end portion of the tape library;

importing the requested tape volume from the front-end portion to the back-end portion where the determination is positive; and

forwarding the intercepted message along to the operator where the determination is negative.

13. An agent for managing the transfer of tapes in a storage system comprising:

the agent being configured to intercept messages in a storage system having a front-end portion running a data protection application and a back-end portion; and

wherein if the agent intercepts a message from the data protection application requesting an end user to manually import a tape located in the back-end portion, the agent automatically transfers the tape to the front-end portion without forwarding the intercepted message.

14. The agent of claim 13 wherein the front-end portion is a tape library.

15. The agent of claim 13 wherein the back-end portion is a tape vault.

16. The agent of claim 13 wherein if the agent intercepts a message from the data protection application requesting an end user to manually export a tape from the front-end portion, the agent transfers the tape to an empty space in the back-end portion without forwarding the intercepted message.

17. The agent of claim 13 wherein the front-end portion is one of a plurality of front-end portions that share the back-end portion.