G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 13/368 (2006.01) G06F 17/30 (2006.01)
Patent
CA 2101569
SYSTEM AND METHODS FOR IMPROVED FILE MANAGEMENT IN A MULTI-USER ENVIRONMENT ABSTRACT OF THE DISCLOSURE A computer system (100) having concurrently shared objects or resources (333) is described. An exemplary embodiment includes a multi-user database management system (150) having information tables (161, 162, 163) and related objects stored in shared directories on a file server (180). A plurality of lock types, including directory lock, full lock, write lock, prevent full lock, and prevent write lock, are provided for controlling concurrent access. Methods (700) are described for managing locks by creating a special lock file (350) for each shared directory that is accessed. The lock file stores at least one logical lock file (400) having locking or concurrency information specific to a family of related members. The logical lock file itself includes a plurality of entries (430) for specifying concurrency information of associated family members. A shared object or resource is accessed according to the information retrieved from the corresponding logical lock file.
Borland International Inc.
Smart & Biggar
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