Strategies for resolving inter-class data conflicts in mixed real-time database systems
Resource
The Journal of Systems and Software 61 (2002) 1–14
Journal
The Journal of Systems and Software
Journal Volume
61
Journal Issue
2002
Pages
-
Date Issued
2002
Date
2002
Author(s)
DOI
246246/2006111501244170
Abstract
Although many efficient concurrency control protocols have been proposed for real-time database systems, they are mainly
restricted for systems with a single type of real-time transactions or a mixed set of soft real-time and non-real-time transactions only.
Their performance objective usually aims at the minimization of the number of missed deadlines of soft real-time transactions or to
guarantee the deadline satisfaction of hard real-time transactions. So far, it is still lack of any good study on the design of concurrency
control strategies for mixed real-time database systems (MRTDBS), which consist of both hard and soft real-time
transactions, and together with non-real-time transactions. Due to the very different performance requirements of hard and soft realtime
transactions, existing real-time concurrency control protocols may not be suitable to MRTDBS. In this paper, we propose
strategies for resolving data conflicts between different types of transactions in an MRTDBS so that the performance requirements
of each individual transaction type can be satisfied and, at the same time, the overall system performance can be improved. The
performance of the proposed strategies is evaluated and compared with a real-time optimistic approach, which has been shown to
give a better performance than the lock-based protocols for soft and firm real-time transactions. 2002 Elsevier Science Inc. All
rights reserved.
Subjects
Real-time database systems
Concurrency control and real-time transaction scheduling
Publisher
Taipei:National Taiwan University Dept Chem Engn
Type
journal article
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