METHOD FOR SELECTIVE COMPRESSION FOR PLANNED DEGRADATION AND OBSOLENCE OF FILES

• US 20100042655A1
• Filed: 08/18/2008
• Published: 02/18/2010
• Est. Priority Date: 08/18/2008
• Status: Abandoned Application

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Zak, Susan Marie, Nagarajan, Ramesh, Tse, Francis K., Beabes, Minette Ann
• Application Number:
  US12/193,324
• Publication Number:
  US 20100042655A1
• Time in Patent Office: Days
• US Class Current: N/A
• CPC Class Codes: G06F 16/122 using management policies backup systems G06F11/1446; file migration policies for HSM systems G06F16/185

Abstract

A system and method manages a file storage system by defining an arbitration policy, the arbitration policy defining a pre-defined usage level threshold and defining implementation priorities for a plurality of storage management mitigation actions, each storage management mitigation action defining a distinct action to be taken to reduce the usage level of the file storage system and a parameter for selecting which file or files stored in the file storage system qualify for the storage management mitigation action. If a usage level of the file storage system is greater than the pre-defined usage level threshold, a storage management mitigation action is selected from the plurality of storage management mitigation actions. Which files that qualify for the selected storage management mitigation action is determined and the selected storage management mitigation action is applied to the files determined to qualify for the selected storage management mitigation action to reduce the usage level of the file storage system.

Claims

1. A method of managing file storage comprising:

defining an arbitration policy, the arbitration policy defining a pre-defined usage level threshold and defining implementation priorities for a plurality of storage management mitigation actions, each storage management mitigation action defining a distinct action to be taken to reduce the usage level of the file storage system and a parameter for selecting which file or files stored in the file storage system qualify for the storage management mitigation action;

determining if a usage level of the file storage system is greater than the pre-defined usage level threshold;

selecting a storage management mitigation action from the plurality of storage management mitigation actions when it is determined that the usage level of the file storage system is greater than the pre-defined threshold and based upon the defined implementation priorities;

determining which files in the file storage system qualify for the selected storage management mitigation action; and

applying the selected storage management mitigation action to the files determined to qualify for the selected storage management mitigation action to reduce the usage level of the file storage system.

2. The method as claimed in claim 1, further comprising:

informing an owner of a determined file of the selected storage management mitigation action before applying the selected storage management mitigation action to the file;

enabling the owner to override the selected storage management mitigation action for the determined file; and

preventing the application of the selected storage management mitigation action to the determined file.

3. The method as claimed in claim 1, further comprising:

informing an owner of a determined file of the selected storage management mitigation action before applying the selected storage management mitigation action to the file;

enabling the owner to select a different storage management mitigation action for the determined file; and

applying the owner selected storage management mitigation action to the determined file.

4. The method as claimed in claim 1, wherein a storage management mitigation action is lossless compression.

5. The method as claimed in claim 1, wherein a storage management mitigation action is lossly compression.

6. The method as claimed in claim 1, wherein a storage management mitigation action is a partial compression.

7. The method as claimed in claim 1, wherein a storage management mitigation action is a purging based on age of file.

8. The method as claimed in claim 1, wherein a storage management mitigation action is a purging based on usage frequency of file.

9. The method as claimed in claim 1, wherein a storage management mitigation action is a purging based on a time period between accessing of the file.

10. A method of managing file storage comprising:

defining an arbitration policy, the arbitration policy defining a pre-defined usage level threshold, and defining an implementation of a compression mitigation action to reduce the usage level of the file storage system and a parameter for selecting which file or files stored in the file storage system qualify for the compression mitigation action, the compression mitigation action includes lossless compression, lossly compression, and partial compression;

determining if a usage level of the file storage system is greater than the pre-defined usage level threshold;

determining which files in the file storage system qualify for the compression mitigation action based upon the defined implementation of the compression mitigation action;

classifying the determined files based upon a content type within the determined files, as lossless candidates, lossly candidates, or partial candidates; and

applying, based upon the classification of the file, lossless compression, lossy compression, or partial compression upon the files determined to qualify for the compression mitigation action to reduce the usage level of the file storage system.

11. The method as claimed in claim 10, wherein a file classified as a partial candidate has a portion of the file compressed using lossless compression and a portion of the file compressed using lossly compression.

12. The method as claimed in claim 10, wherein a file classified as a partial candidate has a portion of the file not compressed and a portion of the file compressed using lossly compression.

13. The method as claimed in claim 10, wherein a file classified as a partial candidate has a portion of the file not compressed and a portion of the file compressed using lossless compression.

14. The method as claimed in claim 10, wherein the compression mitigation action includes dynamic compression such that a user selects a compression technique based upon an acceptable image quality of the compressed file.

15. The method as claimed in claim 10, wherein the files determined to qualify for the compression mitigation action is based on an age of file.

16. The method as claimed in claim 10, wherein the files determined to qualify for the compression mitigation action is based on usage frequency of file.

17. The method as claimed in claim 10, wherein the files determined to qualify for the compression mitigation action is based on a time period between accessing of the file.

18. The method as claimed in claim 11, wherein the user specifies which portion of the file is lossless compressed and which portion of the file is lossly compressed.

19. The method as claimed in claim 12, wherein the user specifies which portion of the file is not compressed and which portion of the file is lossly compressed.

20. The method as claimed in claim 13, wherein the user specifies which portion of the file is not compressed and which portion of the file is lossless compressed.