Backing up selected files of a computer system

• US 7,814,365 B2
• Filed: 07/07/2006
• Issued: 10/12/2010
• Est. Priority Date: 06/09/1995
• Status: Expired due to Fees

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: EMC Corporation (Dell Technologies Inc.)
• Inventors: Galipeau, Kenneth J., Lee, Winston Edward
• Primary Examiner(s): LE, DIEU MINH T
• Application Number:
  US11/483,839
• Publication Number:
  US 20060253733A1
• Time in Patent Office: 1,558 Days
• Field of Search: 714/5, 714/6, 714/8, 714 12- 13, 714/16, 711/112, 711/161, 711/162, 711/165
• US Class Current: 714/6.12
• CPC Class Codes: G06F 11/1435 using file system or storage system metadata
• CPC Class Codes: G06F 11/1451 by selection of backup contents
• CPC Class Codes: G06F 11/1456 Hardware arrangements for backup
• CPC Class Codes: G06F 11/1464 for networked environments
• CPC Class Codes: G06F 11/2074 Asynchronous techniques
• CPC Class Codes: G06F 11/2094 Redundant storage or storage space G06F11/2056 takes precedence
• CPC Class Codes: G06F 11/2097 maintaining the standby controller/processing unit updated initialisation or re-synchronisation thereof G06F11/1658 and subgroups
• CPC Class Codes: Y10S 707/99938 Concurrency, e.g. lock management in shared database

Abstract

A system and method for providing substantially concurrent mirroring of files across a network. A data file is selected for mirroring on a local computer system and one or more remote computer systems are designated to store a back-up copy of the selected data file. As changes to the selected data file occur, change information is captured by a mirroring driver, which is attached to the file system driver, and then forwarded from the local computer system across the network to the remote computer system or systems. Each remote computer system then updates the back-up copy of the data file.

Claims

1. A method of data protection comprising:

intercepting change information representing a change made by a process running on a computer system to a file on the computer system;

determining whether the change information is associated with a file to be mirrored, wherein the file to be mirrored comprises a subset of files stored on the computer system;

storing the change information on a log file; and

transmitting the contents of the log file through a network to a remote log file associated with a remote system configured to use at least in part the change information to enable a data associated with the file on the computer system to be consistent with at least a portion of the file on the computer system.

2. A method as recited in claim 1, further comprising receiving a selection of the file as one to be mirrored.

3. A method as recited in claim 2, wherein receiving the selection of files to be mirrored comprises receiving a version number associated with the selection.

4. A method as recited in claim 1, wherein the change is a write operation.

5. A method as recited in claim 1, wherein the change is a file operation.

6. A method as recited in claim 1, wherein the file is accessed by an application program.

7. A method as recited in claim 1, wherein the change information is transmitted to a second computer.

8. A method as recited in claim 1, wherein the change information is transmitted to a remote computer.

9. A method as recited in claim 1, wherein transmitting the contents of the log file comprises sending new entries in the log file since the last transmission.

10. A system for data protection comprising:

a processor configured to intercept change information representing a change made by a process running on a computer system to a file on the computer system, determine whether the change information is associated with a file to be mirrored, wherein the file to be mirrored comprises a subset of files stored on the computer system, store the change information on a log file, and transmit the contents of the log file through a network to a remote log file associated with a remote system configured to use at least in part the change information to enable a data associated with the file on the computer system to be consistent with at least a portion of the file on the computer system; and

a memory coupled with the processor, wherein the memory is configured to provide the processor with instructions.

11. A system as recited in claim 10, wherein the processor is further configured to receive a selection of the file as one to be mirrored.

12. A system as recited in claim 11, wherein the processor receives the selection of files to be mirrored including by receiving a version number associated with the selection.

13. A system as recited in claim 10, wherein the change is a write operation.

14. A system as recited in claim 10, wherein the change is a file operation.

15. A system as recited in claim 10, wherein the file is accessed by an application program.

16. A system as recited in claim 10, wherein the change information is transmitted to a second computer.

17. A system as recited in claim 10, wherein the change information is transmitted to a remote computer.

18. A system as recited in claim 10, wherein the processor transmits the contents of the log file including by sending new entries in the log file since the last transmission.

19. A computer program product for data protection, the computer program product being embodied in a computer readable medium and comprising computer instructions for:

intercepting change information representing a change made by a process running on a computer system to a file on the computer system;

determining whether the change information is associated with a file to be mirrored, wherein the file to be mirrored comprises a subset of files stored on the computer system;

storing the change information on a log file; and

transmitting the contents of the log file through a network to a remote log file associated with a remote system configured to use at least in part the change information to enable a data associated with the file on the computer system to be consistent with at least a portion of the file on the computer system.

20. A computer program product as recited in claim 19, wherein the transmission is initiated by the computer system substantially concurrently with a time the change to said file occurs.

21. A computer program product as recited in claim 19, further comprising receiving a selection of the file as one to be mirrored.

22. A computer program product as recited in claim 21, wherein receiving the selection of files to be mirrored comprises receiving a version number associated with the selection.

23. A computer program product as recited in claim 19, wherein the change is a write operation.

24. A computer program product as recited in claim 19, wherein the change is a file operation.

25. A computer program product as recited in claim 19, wherein the file is accessed by an application program.

26. A computer program product as recited in claim 19, wherein the change information is transmitted to a second computer.

27. A computer program product as recited in claim 19, wherein the change information is transmitted to a remote computer.

28. A computer program product as recited in claim 19, wherein transmitting the contents of the log file comprises sending new entries in the log file since the last transmission.