Title: Improving the quality of service of real-time database systems through a semantics-based scheduling strategy

Authors: Fehima Achour; Emna Bouazizi; Wassim Jaziri

Addresses: MIRACL Laboratory, The Higher Institute of Computer Science and Multimedia, P.B. 242, Sfax 3021, Tunisia ' MIRACL Laboratory, The Higher Institute of Computer Science and Multimedia, P.B. 242, Sfax 3021, Tunisia; The College of Computer Science and Engineering, University of Jeddah, Jeddah, Saudi Arabia ' MIRACL Laboratory, The Higher Institute of Computer Science and Multimedia, P.B. 242, Sfax 3021, Tunisia; The College of Computer Science and Engineering, Taibah University, Almadimah, KSA

Abstract: A real-time database management system (RTDBMS) aims to manage applications with a large number of data being accessed by update and user transactions having to meet some time constraints. We are interested in improving the quality of service (QoS) in RTDBMSs by optimising the execution of transactions to improve meeting their deadlines. A new scheduling strategy is developed and evaluated into a QoS management architecture called feedback control scheduling (FCS) proposed for RTDBMSs. The proposed strategy is based on the new advanced earliest deadline first based on transactions aggregation and data semantic links (AEDF-TAL-DSL) protocol we developed. It introduces new parameters relating to the aggregation links (defined according to the type of operations composing the transactions and the data they access) existing between transactions as well as the semantic links appearing between the users' queries. We also show the contributions provided by our approach through simulation results.

Keywords: real-time database management system; transactions; quality of service; QoS; user satisfaction; scheduling; feedback control; aggregation links; semantic links; AEDF-TAL-DSL; simulation.

DOI: 10.1504/IJIIDS.2021.112144

International Journal of Intelligent Information and Database Systems, 2021 Vol.14 No.1, pp.96 - 114

Received: 23 Jan 2020
Accepted: 14 Jul 2020
Published online: 04 Jan 2021 *

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