Replication management in reliable real-time systems

L M Pinho, F Vasques, A Wellings

Research output: Contribution to journalArticlepeer-review


Building reliable real-time applications on top of commercial off-the-shelf (COTS) components is not a straightforward task. Thus, it is essential to provide a simple and transparent programming model, in order to abstract programmers from the low-level implementation details of distribution and replication. However, the recent trend for incorporating pre-emptive multitasking applications in reliable real-time systems inherently increases its complexity. It is therefore important to provide a transparent programming model, enabling preemptive multitasking applications to be implemented without resorting to simultaneously dealing with both system requirements and distribution and replication issues. The distributed embedded architecture using COTS components (DEAR-COTS) architecture has been previously proposed as an architecture to support real-time and reliable distributed computer-controlled systems (DCCS) using COTS components. Within the DEARCOTS architecture, the hard real-time subsystem provides a framework for the development of reliable real-time applications, which are the core of DCCS applications. This paper presents the proposed framework, and demonstrates how it can be used to support the transparent replication of software components.

Original languageEnglish
Pages (from-to)261-296
Number of pages36
JournalReal-Time Systems
Issue number3
Publication statusPublished - Apr 2004


  • real-time systems
  • software-based fault tolerance
  • distributed computer-controlled systems
  • transparent replication

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