Remote disaster data recovery system and method

• US 20050039069A1
• Filed: 04/05/2004
• Published: 02/17/2005
• Est. Priority Date: 04/03/2003
• Status: Abandoned Application

• Current Assignee: CommVault Systems Incorporated
• Original Assignee: CommVault Systems Incorporated
• Inventors: May, Andreas, Ngo, David, Prahlad, Anand, Lunde, Norman R., Kumar, Avinash, Zhou, Lixin
• Application Number:
  US10/819,103
• Publication Number:
  US 20050039069A1
• Time in Patent Office: Days
• US Class Current: 714/2
• CPC Class Codes: G06F 11/1456 Hardware arrangements for backup
• CPC Class Codes: G06F 11/1458 Management of the backup or restore process
• CPC Class Codes: G06F 11/1464 for networked environments

Abstract

The present invention provides computer systems, methods, and software products enabling the creation and maintenance of disaster recovery volumes having a reduced impact with regard to network traffic over a communications network. A disaster recovery volume is generally created at a local archival storage unit including therein at least one storage medium constituting the disaster recovery volume. The medium constituting the disaster recovery volume is associated with the primary volume thereby allowing the storage medium constituting the disaster recovery volume to be relocated to a remote archival storage unit at a remote location without compromising the association between the primary volume and the disaster recovery volume. Incremental changes to the primary volume may then be communicated and incorporated in to the disaster recovery relocated to the remote location.

Claims

1. A disaster recovery computer system comprising at least one computer having programming associated therewith, the at least one computer communicatively connected to at least one local archival storage unit and at least one remote archival storage unit, wherein the computer programming when executed provides data transfer and control capability to create at the local archival storage unit a disaster recovery volume of a primary volume on at least one storage medium, which storage medium constitutes the disaster recovery volume, the computer programming associates the storage medium constituting the disaster recovery volume with the primary volume thereby allowing the storage medium to be relocated to a remote location without compromising the association between the primary volume and the disaster recovery volume.

2. The system of claim 1 wherein the at least one computer comprises at least one client computer and at least one server computer, the client computer having programming associated therewith providing data transfer and control capability thereto capable of packaging and communicating primary volume data to the local storage unit.

3. The system of claim 2, the client computer comprising at least one intelligent data agent program module therewith providing application specific data packaging capability to the client computer.

4. The system of claim 3, the server computer comprising at least one of a media agent program module and a storage manager program module, the server computer adopted therewith to receive packaged data from the client computer and control the transfer of the packaged data to the local archival storage unit.

5. The system of claim 3, the server computer comprising at least one of a media agent program module and a storage manager program module, the server computer adopted therewith to receive packaged data from the client computer and control the transfer of the packaged data to the remote archival storage unit.

6. The system of claim 2, the client computer comprising at least one quick recovery agent program module providing therewith snapshot image packaging capability, the quick recovery agent module capable of packaging a snapshot image of the primary volume for the creation of the disaster recovery volume of the primary volume at the local archival storage unit.

7. The system of claim 6, wherein the disaster recovery volume comprises a snapshot image of the primary volume.

8. The system of claim 2, the client computer comprising at least one intelligent data agent program module that provides application specific data packaging capability, the client computer therewith capable of identifying and packaging incremental changes to the primary volume.

9. The system of claim 8, the server computer comprising at least one of a media agent program module and a storage manager program module, the server computer adopted therewith to receive packaged data representing the incremental changes to the primary volume and control the transfer of the packaged data to the remote archival storage unit.

10. The system of claim 2, the server computer comprising at least one media agent program module, the server computer adopted therewith to create a disaster recovery volume of a primary volume from at least one copy selected from the group consisting of:

a backup volume of the primary volume, a quick recovery volume of the primary volume, and a snapshot image of the primary volume.

11. The system of claim 2, the server computer comprising at least one media agent program module, the server computer adopted therewith to create a disaster recovery volume of a primary volume in connection with a quick recovery volume, the disaster recovery volume created from at least one snapshot image of the primary volume.

12. The system of claim 2, the server computer comprising at least one media agent program module, the server computer adopted therewith to effect incremental changes to a disaster recovery volume relocated to the remote storage unit, the incremental changes representing incremental changes to the primary volume, the incremental changes made in connection with at least one snapshot image of the primary volume taken after the creation of the disaster recovery volume.

13. The system of claim 2, wherein the media constituting the disaster recovery volume is associated with the primary volume by including therein indicia for identifying the medium as at least a portion of the disaster recovery volume of the primary volume.

14. The system of clam 13, wherein the indicia comprises a tag included in each medium constituting the disaster recovery volume that identifies the source of data therein and information regarding a date and time the disaster recovery volume was created.

15. A disaster recovery computer system comprising at least one client computer and at least one server computer each communicatively interconnected to at least one local archival storage unit and at least one remote archival storage unit, the client and server computers having programming associated therewith that when executed provides data transfer and control capability to create a disaster recovery volume of a primary volume on at least one storage medium, which storage medium constitutes the disaster recovery volume, at the local archival storage unit, wherein the computer programming is capable of associating the primary volume and the disaster recovery volume by including a tag in the storage medium that associates the storage medium with the primary volume which allows the storage medium to be relocated to a remote location without compromising the association between the volumes, the computer programming further capable of identifying and packaging incremental changes to the primary volume and communicating the incremental changes over a communications network to a particular disaster recovery volume relocated to the remote archival storage unit at a location remote from the local archival storage unit.

16. A computer readable medium storing program code which when executed on a computer, causes the computer to perform a method for creating a disaster recovery volume of a primary volume associated with a first computer, the method comprising:

packaging a primary data set associated with the primary volume;

communicating the packaged primary data set associated with the primary volume to a local archival storage unit including therein at least one storage medium;

copying the packaged primary data set to the at least one storage medium, the at least one storage medium constituting the disaster recovery volume; and

associating the at least one storage medium constituting the disaster recovery volume with the primary volume thereby allowing the storage medium constituting the disaster recovery volume to be relocated to a remote archival storage unit at a remote location without compromising the association between the primary volume and the disaster recovery volume.

17. The computer readable medium of claim 16, wherein the method of creating a disaster recovery volume comprises synchronizing at least one of an application and an operating system associated with the first computer so that essentially all data of the primary data set is copied to the local archival storage unit and so that the primary data set is not modified during the creation of the disaster recovery volume at the local archival storage unit.

18. The computer readable medium of claim 17, wherein the step of synchronizing at least one of an application and an operating system associated with the first computer comprises suspending at least one of input and output to a disk containing at least a portion of the primary data set and resuming at least one of input and output to the disk containing at least a portion of the primary data set after the creation of the disaster recovery volume.

19. The computer readable medium of claim 16, wherein the disaster recovery volume comprises a snapshot image of the primary volume.

20. The computer readable medium of claim 16, wherein the step of associating the primary volume with the at least one medium constituting the disaster recovery volume comprises including therein indicia for identifying the medium as at least a portion of the disaster recovery volume of the primary volume.

21. The computer readable medium of claim 20, wherein the indicia comprises a tag included in each medium constituting the disaster recovery volume identifying the source of data therein and information regarding a date and time the disaster recovery volume was created.

22. The computer readable medium of claim 16, wherein the method of creating a disaster recovery volume comprises:

identifying incremental changes to the primary volume;

packaging data representing incremental changes to the primary volume; and

communicating the packaged data over a communications network to the remote location.

23. The computer readable medium of claim 22, wherein the step of packaging data representing incremental changes to the primary volume comprises compressing the data representing incremental changes to the primary volume.

24. The computer readable medium of claim 22, wherein the method of creating a disaster recovery volume comprises incorporating the incremental changes to the primary volume into the disaster recovery volume relocated to the remote location.

25. The computer readable medium of claim 22, wherein the method of creating a disaster recovery volume comprises identifying incremental changes to the primary volume in connection with at least one snapshot image of the primary volume.

26. The computer readable medium of 16, wherein the method comprises creating a disaster recovery volume of a primary volume from at least one copy selected from the group consisting of a backup volume of the primary volume, a quick recovery volume of the primary volume, and a snapshot image of the primary volume.

27. A computer readable medium storing program code which when executed on a computer, causes the computer to perform a method for creating a disaster recovery volume of a primary volume associated with a first computer, the method comprising:

packaging a primary data set associated with the primary volume;

communicating the packaged primary data set associated with the primary volume to a local archival storage unit including therein at least one storage medium;

copying the packaged primary data set to the at least one storage medium, the at least one storage medium constituting the disaster recovery volume;

associating the at least one storage medium constituting the disaster recovery volume with the primary volume thereby allowing the storage medium constituting the disaster recovery volume to be relocated to a remote archival storage unit at a remote location without compromising the association between the primary volume and the disaster recovery volume, wherein the primary volume is associated with the at least one medium constituting the disaster recovery volume by including therein indicia for identifying the medium as at least a portion of the disaster recovery volume of the primary volume and identifying the date and time the disaster recovery volume was created;

identifying incremental changes to the primary volume;

packaging data representing incremental changes to the primary volume; and

communicating the packaged data over a communications network to the remote location; and

incorporating incremental the incremental changes to the primary volume into the disaster recovery volume relocated to a remote location.

28. A method for creating a disaster recovery volume of a primary volume comprising:

creating a backup copy of at least a portion of a primary volume on at least one storage medium at a first location;

transferring physically the at least one storage medium to a second location remote from the first location; and

updating the backup copy at the second location over a communications network to reflect incremental changes to the primary volume subsequent to the creation of the backup copy.

29. The method of claim 28, wherein the step of creating a backup copy comprises associating the storage medium with the primary volume thereby allowing the storage medium to be relocated to the second location.

30. The method of claim 28, wherein the step of creating a backup copy comprises synchronizing at least one of an application and an operating system associated with the primary volume to allow essentially all data of the primary volume to be copied to the storage medium and to prevent the primary volume from being modified.