Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2007-02-27
2007-02-27
Ali, Mohammad (Department: 2166)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000, C707S793000, C707S793000
Reexamination Certificate
active
10618135
ABSTRACT:
A mechanism for replicating and maintaining files in a space-efficient manner is disclosed. In one embodiment, a current file is replicated by associating the data blocks of the current file with both the current file and a new file. The new file and the current files are separate and distinct from each other. Data blocks remain shared until the content of one file is modified. Only the data blocks affected by the modification are duplicated. The two files share the unchanged data blocks, but both files are each associated with additional data blocks that reflect the modification. Reference values are used to track how many files are associated with each data block. In another embodiment, a file descriptor is linked to a filename at the request of a user or application. The present invention avoids needless duplication of the same data blocks among copies of a file.
REFERENCES:
patent: 5813017 (1998-09-01), Morris
patent: 5819292 (1998-10-01), Hitz et al.
patent: 6269431 (2001-07-01), Dunham
patent: 6341341 (2002-01-01), Grummon et al.
patent: 6389423 (2002-05-01), Sakakura
patent: 6460054 (2002-10-01), Grummon
patent: 6473775 (2002-10-01), Kusters et al.
patent: 6539381 (2003-03-01), Prasad et al.
patent: 6553391 (2003-04-01), Goldring et al.
Network Appliance Technical Report 3002 (Rev. C 3/95), entitled “File System Design for an NFS File Server Appliance”, by Dave Hitz, et al., dated Jan. 19, 1994.
Ali Mohammad
Harper Leon J.
Hickman Palermo & Truong & Becker LLP
Sun Microsystems Inc.
LandOfFree
Mechanism for replicating and maintaining files in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mechanism for replicating and maintaining files in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mechanism for replicating and maintaining files in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3819320