O. Ulusoy, "Analysis of Concurrency Control Protocols for RealTime Database Systems", Information Sciences, 1997. Home/Search Document Details and Download
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This paper is cited in the following contexts:
Real-Time Databases: Extended Transactions And The Utilization Of.. - Dogdu (Correct)
....Database Simulation System An analytical performance model is hard to come up with for RTDBMSs. Due to the complexity of transaction processing in RTDBMSs and because of unpredictable disk access times and data availability problems, even simple models are not very reliable [Har 94, Tay 95, Ulu 97] Therefore, we follow the trend in RTDBMSs research for performance analysis, and use computer simulation to test and report on the performance of the models we propose in this thesis. We simulate a single site real time database system. SimPack simulation toolkit [Fish 95] is used to build the ....
O. Ulusoy, "Analysis of Concurrency Control Protocols for RealTime Database Systems", Information Sciences, 1997.
Designing Persistence for Real-Time Distributed Object.. - Nekrestyanov, Novikov.. (1998) (Correct)
....are out of the scope of these papers. Typeless representations for persistent objects in distributed heterogeneous systems are defined in [7] This work does not consider neither real time requirements nor performance issues. Concurrency control protocols for real time databases were studied in [3, 13, 14]. However, this work is mostly related to protocol enhancements that make response time predictable, and does not consider actual implementation. 6 Conclusions The paper describes potential implementation of persistent object store for real time systems with very tight time constraints. The ....
O. Ulusoy. Analysis of concurrency control protocols for real-time database systems. Technical Report BU-CEIS-9514, Bilkent University, 1995.
Concurrency Control Protocol for Nested Transactions in.. - Pavlova, Nekrestyanov (1997) (Correct)
....[12] Depending on the kind of deadlines, RTDBS are divided into three groups hard, firm and soft deadline systems. Taking into account these differences, considerable research has recently been devoted to designing concurrency control for RTDBSs and to evaluating their performance [11, 15, 14, 16]. Most of these studies assume theflat transaction model and use serializability [5] for maintaining data consistency. They also consider time constraints associated only with transactions. During the last few years, research has been done that attempted to use different assumptions. Some works ....
....of the system is maximized, but part of work is useless. 2.3 Optimistic vs Pessimistic Some research on experimental and theoretical comparison of both described approaches has been done. As was shown in conventional database management systems, pessimistic, approach outperform optimistic one [7, 14]. In the context of the real time databases, preventing possible conflicts is the weak point of the pessimistic approach. It causes useless transaction idle time and as a result increases the number of transactions that missed their deadlines. The wait is useless if the transaction that caused ....
O. Ulusoy. Analysis of concurrency control protocols for realtime database systems. Technical Report BU-CEIS-9514, Bilkent University, 1995.
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