Real-time Optimistic Concurrency Control based on Transaction Finish Degree
نویسندگان
چکیده
منابع مشابه
Real-time Optimistic Concurrency Control based on Transaction Finish Degree
Concurrency control is one of the main issues in the studies of real-time database systems. Optimistic concurrency control algorithms have the attractive properties of being non-blocking and deadlock-free. However, they have the problems of late conflict detection and transaction restarts. Although the number of transaction restarts is reduced by dynamic adjustment of serialization order in rea...
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In many real time applications, security is an important requirement, since the system maintains sensitive information to be shared by multiple users with different security levels. A secure real-time database system must satisfy not only logical data consistency but also the timing constraints and security requirements associated with transactions. Even though an optimistic concurrency control...
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Due to its potential for a high degree of parallelism, optimistic concurrency control is expected to perform better than two-phase locking when integrated with priority-driven CPU scheduling in real-time database systems. In this paper, we examine the overall effects and the impact of the overheads involved in implementing real-time optimistic concurrency control. Using a locking mechanism to e...
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Transactions in real-time database systems are associated with certain timing constraints derived either from temporal consistency requirements of data or from requirements imposed on system reaction time. Fundamental requirements of real-time database systems are timeliness, i.e., the ability to produce expected transaction results early or at the right time, and predictability, i.e., the abil...
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ژورنال
عنوان ژورنال: Journal of Computer Science
سال: 2005
ISSN: 1549-3636
DOI: 10.3844/jcssp.2005.471.476