Integrating standard transactions in firm real-time database systems

Thomas, Shiby ; Seshadri, S. ; Haritsa, Jayant R. (1996) Integrating standard transactions in firm real-time database systems Information Systems, 21 (1). pp. 3-28. ISSN 0306-4379

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Real-time database systems are designed to handle workloads where transactions have completion deadlines and the goal is to meet these deadlines. However, many real-time database environments are characterized by workloads that are a mix̲ of real-time and standard (non-real-time) transactions. Unfortunately, the system policies used to meet the performance goals of real-time transactions often work poorly for standard transactions. In particular, optimistic concurrency control algorithms are recommended for real-time transactions, whereas locking-based protocols are suited for standard transactions. In this paper, we present a new database system architecture in which real-time transactions use optimistic concurrency control and, simultaneously, standard transactions use locking. We prove that our architecture maintains data integrity and show, through a simulation study, that it provides significantly improved performance for the standard transactions without diminishing the real-time transaction performance. We also show, more generally, that the proposed architecture correctly supports the co-existence of any group of concurrency control algorithms that adhere to a standard interface.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Real-time Database; Concurrency Control
ID Code:62450
Deposited On:22 Sep 2011 03:19
Last Modified:22 Sep 2011 03:19

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