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In this paper, we investigate the approach to relaxing consistency requirement of serializability to improve the performance of real-time database systems. We make use of the property that a read-only transaction (ROT) only reads, but does not update any data item. Since there is a significant proportion of ROTs in several real-time systems, it is important to investigate how to process ROTs effectively...
A secure concurrency control algorithm must, in addition to maintaining consistency of the database, be free from covert channels arising due to data conflicts between transactions. Since the property of noninterference must be satisfied to ensure security, most existing secure concurrency control algorithms are unfair to transactions at higher access classes. In this paper, a secure two-phase locking...
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