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A Dynamic (m,k)-firm Constraint to Avoid Dynamic Failures in a Real-Time DBMS

Authors:
Sami Limam
Leila Baccouche
Henda Ben Ghezala

Keywords: (m,k)-firm; real time scheduling; Imprecise Computation.

Abstract:
Current applications such as stock markets, e-business, multimedia and telecommunications require further real-time services. Such systems deal with large quantities of data, and transactions have temporal constraints. Among these applications, some of them must face unpredictable workloads. The aim of our work is to maintain a robust RTDBS behavior and to decrease the number of transactions which miss their deadline.In this paper, we propose an approach based on the (m,k)-firm model that allows to control the RTDBS behavior, in particular during the instability phases, in order to improve the quality of service (QoS) of applications. Multi-class transactions are scheduled by DBP_CC and we have to adapt QoS level for each class to the load of the system.

Pages: 67 to 73

Copyright: Copyright (c) IARIA, 2012

Publication date: July 22, 2012

Published in: conference

ISSN: 2308-3735

ISBN: 978-1-61208-217-2

Location: Nice, France

Dates: from July 22, 2012 to July 27, 2012