Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2008-07-22
2008-07-22
Cottingham, John (Department: 2167)
Data processing: database and file management or data structures
Database design
Data structure types
Reexamination Certificate
active
07403945
ABSTRACT:
A distributed database system providing data and space management methodology is described. In one embodiment, for example, a method is described for detection of deadlocks in a distributed database system comprising a plurality of servers sharing access to data, the method comprises steps of: in response to a task at a first server waiting to obtain a lock regulating access to data, sending a search request including lock information to a second server holding the lock; at the second server, examining dependencies of the task holding the lock based on the lock information received with the search request and local lock information; if the task holding the lock is waiting to obtain a lock held by an additional server, forwarding the search request and local lock information to the additional server; repeating the examining and forwarding steps until all dependencies are examined; and responding to the search request indicating whether a deadlock was detected and providing lock information found.
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Francis Joe
Lin Mei-Lin Linda
Ramachandran Satya N.
Sampath Srikanth
Varakur Gangavara Prasad
Badawi Sherief
Cottingham John
Riddle G. Mack
Smart John A.
Sybase Inc.
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