Data processing: database and file management or data structures – Data integrity
Reexamination Certificate
2007-11-19
2010-10-26
Corrielus, Jean M (Department: 2162)
Data processing: database and file management or data structures
Data integrity
C707S704000
Reexamination Certificate
active
07822719
ABSTRACT:
A method for managing locking requests for a computer file is disclosed. A plurality of locks is maintained for the file, the plurality of locks having locks of different types. Constraints are tracked on the plurality of locks of different types. A request for a requested lock is received. A determination is made if the requested lock violates any of the constraints on the plurality of locks. The requested lock is granted if there is no violation of any constraint on any of the plurality of locks. The requested lock is denied if the requested lock violates any constraint on any of the plurality of locks. An action disposition set having bit positions which define each lock of the plurality of locks is maintained. Bit-wise logic using the action disposition set determines if a requested lock violates any constraint on any of the plurality of locks.
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Cesari and McKenna LLP
Corrielus Jean M
NetApp, Inc.
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