System and method for designating and deleting expired files

Details System and method for designating and deleting expired files System and method for designating and deleting expired files

2005-12-20

2005-12-20

Corrielus, Jean M. (Department: 2162)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000

Reexamination Certificate

active

06978284

ABSTRACT:
A system and method for designating and deleting expired files includes a means for storing expiration dates along with file identification data maintained by the file system. An earliest expiration date is stored in data maintained by the file system pertaining to each directory. In this manner, a check of the directory data indicates whether one or more expired files exist in the directory. The system date is compared to the earliest expiration date for a directory, for example when a “list contents of directory” command is received. If the earliest expiration date is earlier than the system date then a comparison is made with the files in the directory and individual files with expiration dates earlier than the current date are deleted. The earliest expiration date is then update to the correspond to the next earliest expiration date falling after the current date.

REFERENCES:
patent: 6185474 (2001-02-01), Nakamura et al.
patent: 6301670 (2001-10-01), Motoyama et al.
patent: 6304948 (2001-10-01), Motoyama et al.
patent: 6314565 (2001-11-01), Kenner et al.
patent: 6577806 (2003-06-01), Hirota
patent: 6687846 (2004-02-01), Adrangi et al.

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