An Optimistic Concurrency Control Protocol for Replicated Databases

2009 ◽  
pp. 327-351
Author(s):  
Yuri Breitbart ◽  
Henry F. Korth ◽  
Avi Silberschatz
Keyword(s):  
Concurrency Control ◽  
Optimistic Concurrency Control ◽  
Control Protocol ◽  
Replicated Databases

Embedded Real-Time Database System Concurrency Control Protocol AC-Based OCC-FV

2012 ◽  
Vol 263-266 ◽  
pp. 1402-1406 ◽  
Author(s):  
Zhi Cheng Liu ◽  
Dong Sheng Lin ◽  
Yun Zhi Ning
Keyword(s):  
Real Time ◽  
Concurrency Control ◽  
The Body ◽  
Suitable Alternative ◽  
Optimistic Concurrency Control ◽  
Control Protocol ◽  
Safe State ◽  
Real Time Database ◽  
Basic Characteristics ◽  
Ready Queue

Alternative and compensation are not only two basic characteristics of the real-time transaction but also the body of the concurrency control. At the same time, new problems are brought. AC-Based OCC-FV protocol associates alternative and compensation with optimistic concurrency control protocol OCC-FV. For each transaction in accepted queue, an alternative which causes no conflict can be chosen to join the ready queue as soon as possible. This is just a kind of ideal circumstance. If the conflict is inevitable, it is necessary to choose a suitable alternative to join the concurrency control, but also ensures the system to be in a safe state when conflicts take place. In conflict resolution, the optimistic concurrency control protocol OCC-FV is extended in combination with the compensation characteristic, when the transaction failed, immediate dispatch of corresponding compensation transactions is taken to prevent the system from disaster.

Optimistic concurrency control protocol for real-time databases

1997 ◽  
Vol 38 (2) ◽  
pp. 119-131 ◽  
Author(s):  
Kwok-wa Lam ◽  
Kam-yiu Lam ◽  
Sheung-lun Hung
Keyword(s):  
Real Time ◽  
Concurrency Control ◽  
Optimistic Concurrency Control ◽  
Control Protocol
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