Data processing: database and file management or data structures – Data integrity – Concurrent read/write management using locks
Reexamination Certificate
2006-12-11
2010-06-22
Ehichioya, Fred I (Department: 2156)
Data processing: database and file management or data structures
Data integrity
Concurrent read/write management using locks
C707S999008, C707S999100, C707S999200, C709S210000
Reexamination Certificate
active
07743039
ABSTRACT:
File systems which provide several different and improved locking capabilities. An application on a client workstation communicates through a client driver to a server which interfaces with a metadata database, which contains locking information about the files. Applications perform as normal. The client driver provides lock and unlock requests to the server when a write lock or a read with intent to write lock is required. If only a read lock is considered appropriate, the client driver does not provide a lock request. The server transparently performs read operations and read locking using the metadata database without specific requests from the client driver. When a read with intent to write or write lock is required, the lock ownership is placed with a given expiration time. When the time expires the lock is not automatically released but remains with the particular requesting client driver until another client driver requests it.
REFERENCES:
patent: 6178440 (2001-01-01), Foster et al.
patent: 2003/0105755 (2003-06-01), Daynes
patent: WO 89/03086 (1988-01-01), None
Eastman, Jr. John M.
Jones Chad Frederick
Mattair, Jr. Charles G.
White, Jr. John Thomas
Ehichioya Fred I
SimDesk Technologies, Inc.
Wong Cabello Lutsch Rutherford & Brucculeri LLP
LandOfFree
File operations with multiple level file locking techniques does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with File operations with multiple level file locking techniques, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and File operations with multiple level file locking techniques will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4207736