NDLI: Workload redistribution for fault-tolerance in a hard real-time distributed computing system

Content Provider	IEEE Xplore Digital Library
Author	Balaji, S. Jenkins, L. Patnaik, L.M. Goel, P.S.
Copyright Year	1989
Description	Author affiliation: ISRO Satellite Centre, Bangalore, India (Balaji, S.)
Abstract	In a hard real-time distributed computing system (HRTDCS), all the tasks are required to meet their associated deadlines; a task not meeting its deadline leads to a catastrophic failure of the system. The authors consider an HRTDCS that executes both periodic and aperiodic tasks associated with timing, precedence, and resource constraints. The fault-tolerance capability in such a system is achieved through the use of time redundancy. The problem of workload redistribution for fault tolerance in an HRTDCS is studied. A graph model to represent the system workload is developed. Three performance measures for the analysis of an HRTDCS are defined. A nonpreemptive scheduling algorithm is proposed to distribute the workload of the operational nodes of the HRTDCS in the presence of both hardware and task failures. This task allocation strategy is applied to a practical system, namely, the HRTDCS onboard a spacecraft. The performance measures obtained for a typical system workload indicate that the algorithm is quite suitable for an HRTDCS with regard to uniform workload distribution.<>
Starting Page	366
Ending Page	373
File Size	585060
Page Count	8
File Format	PDF
ISBN	0818619597
DOI	10.1109/FTCS.1989.105594
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-06-21
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fault tolerance Real time systems Distributed computing Timing Fault tolerant systems Redundancy Performance analysis Scheduling algorithm Hardware Space vehicles
Content Type	Text
Resource Type	Article

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