Free space management

• US 20040122873A1
• Filed: 12/20/2002
• Published: 06/24/2004
• Est. Priority Date: 12/20/2002
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Wright, Cornell G. Jr., Wright, Cornell G. III
• Granted Patent: US 7,136,885 B2
• Time in Patent Office: Days
• US Class Current: 707/205
• CPC Class Codes: G06F 12/12 Replacement control
• CPC Class Codes: G06F 16/162 Delete operations erasing in storage systems G06F3/0652
• CPC Class Codes: G06F 16/9574 of access to content, e.g. by caching
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0652 Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket
• CPC Class Codes: G06F 3/0674 Disk device
• CPC Class Codes: Y10S 707/99956 File allocation

Abstract

An attribute is associated with one or more files stored on a storage medium, wherein the attribute is indicative to software utilized by a processor to access the files that the files are deletable. One or more files associated with the attribute can be deleted. Files can be deleted, for example, based upon receipt of a request for file system space. A sufficient amount of free space can be created to fulfill the request via the deletion of the one or more files associated with the attribute. A history of accesses to the files can be maintained and a least recently accessed file, associated with the attribute, can be deleted. Files can also be deleted according to a priority included in the attribute.

Claims

1. A method of managing file system free space, comprising:

associating an attribute with one or more files stored on a storage medium,

wherein the attribute is indicative to software utilized by a processor to access the files that the files are deletable; and

deleting one or more files associated with the attribute, if file system space is needed for other processing.

2. The method of claim 1 additionally comprising the steps of:

receiving a request for file system space;

determining if sufficient space is available on the storage medium to fulfill the request; and

creating a sufficient amount of free space to fulfill the request via the deletion of the one or more files associated with the attribute.

3. The method of claim 2 wherein the request for additional file space comprises one of:

a) a request to store temporary files and b) a request to store intermediate results.

4. The method of claim 1 wherein the steps of associating an attribute with one or more files stored on a storage medium and deleting one or more files associated with the attribute, are implemented by software routines internal to application software.

5. The method of claim 1 additionally comprising the steps of:

maintaining a history of accesses to the files associated with the attribute; and

deleting a least recently accessed file that is associated with the attribute indicating the file is deletable.

6. The method of claim 1 wherein the software utilized by the processor to access the files comprises one of:

a) file system software and b) operating system software.

7. The method of claim 1 wherein the attribute is associated with a directory entry for the file.

8. The method of claim 1 wherein the files with the associated attribute indicating that the files are deletable comprise a web browser cache.

9. The method of claim 1 wherein the association of the attribute with the one or more files stored on a storage medium is automatically implemented by one of:

a) application software, b) operating system software, and c) file system software.

10. The method of claim 1 wherein user interaction with the processor implements association of the attribute with the one or more files stored on a storage medium.

11. The method of claim 10 wherein the user interacting with the processor to implement association of the attribute with the one or more files has write permissions to the one or more files.

12. The method of claim 1 wherein the one or more files associated with the attribute comprise a directory or subdirectory.

13. The method of claim 1 wherein the attribute associated with the one or more files further comprises an indication of a priority level for deletion.

14. The method of claim 1 additionally comprising the steps of:

notifying a user associated with the file of pending deletion of the file; and

receiving an indication from the user affirming deletion of the file.

15. A system for facilitating management of file system space, comprising:

a storage medium for storing files;

an attribute associated with one or more stored files wherein the attribute indicates to computer code that the file is deletable; and

a processor operative with the computer code for accessing the files stored on the storage medium and for deleting one or more files associated with the attribute if file system space is needed for other processing.

16. The system of claim 15 wherein the storage medium is a magnetic disk drive.

17. The system of claim 15 wherein the storage medium and processor comprise one of:

a) a server, b) a personal computer, c) a personal digital assistant and d) a mobile communication device.

18. A computer program product in a computer readable medium for facilitating management of file system space, comprising:

first instructions for associating an attribute with one or more files stored on a storage medium, wherein the attribute is indicative to software utilized by a processor to access the files that the files are deletable; and

second instructions for deleting one or more files associated with the attribute if file system space is needed for other processing.

19. The computer program product of claim 18 additionally comprising:

third instructions for receiving a request for file system space;

fourth instructions for determining if sufficient space is available on the storage medium to fulfill the request; and

fifth instructions for creating a sufficient amount of free space to fulfill the request via the deletion of the one or more files associated with the attribute.

20. The computer program product of claim 18 additionally comprising:

third instructions for maintaining a history of accesses to the files; and

fourth instructions for selecting a least recently used file for deletion.