Dynamic configuration management in reliable distributed real-time information systems

Kim, K.H.; Subbaraman, C.

doi:10.1109/69.755632

Cited by 22 publications

(2 citation statements)

References 18 publications

(26 reference statements)

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“…Both network surveillance schemes -simple master/slave and PRHB -are used for broadcast networks only. A scheme called supervisory-based network surveillance (SNS) for the point-to-point networks was proposed in [58]. The scheme utilizes two types of nodes -worker nodes and supervisor nodes.…”

Section: Network Surveillancementioning

confidence: 99%

Survey and future directions of fault-tolerant distributed computing on board spacecraft

Fayyaz

Vladimirova

2016

Advances in Space Research

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Current and future space missions demand highly reliable on-board computing systems, which are capable to carry out high-performance data processing. At present no single computing scheme could efficiently tackle high-performance computing as well as reliability. This paper aims to address that gap. In the first part of the paper, a detailed survey of fault-tolerant distributed computing systems for space applications is presented. Fault types and performance parameters for assessment of a fault-tolerant system are introduced. Redundancy schemes for distributed systems are analysed. A review of the state-of-the-art on fault-tolerant distributed systems is presented and limitations of current approaches are discussed. In the second part of the paper, a new fault-tolerant distributed computing platform with wireless links among the computing nodes is proposed. Novel algorithms, enabling important aspects of the architecture, such as time slot priority adaptive fault-tolerant channel access and fault-tolerant distributed computing using task migration are introduced.

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Section: Network Surveillancementioning

confidence: 99%

Survey and future directions of fault-tolerant distributed computing on board spacecraft

Fayyaz

Vladimirova

2016

Advances in Space Research

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“…In a local area network (LAN) environment, the timing behavior of the network is under considerable influence of the OS. The research on the effect of the combination of a communication infrastructure and a OS on the response time of an application system has increased steadily in recent years [Kim99a,Kop97]. In fact, an important consideration in designing and configuring a real-time OS is to properly influence / control the communication network.…”

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confidence: 99%

Analysis of guaranteed service times of distributed real-time objects

Kim

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR0060

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Position paper)As the demands for real-time distributed systems increase, the needs for programming tools useful in development of such application systems are becoming increasingly acute. An issue that the research community has long recognized as an important technological challenge but has not shown much progress in meeting the challenge is to guarantee response times of real-time distributed systems. Two basic problems must be solved to effectively meet this challenge:(1) To establish the distributed real-time program structure and the system infrastructure structure, i.e., the structure of the operating system (OS) and the communication infrastructure, that enable systematic analysis of the worst-case time behavior of the application systems; and(2) To establish a tool which performs automated analysis of the worst-case time behavior while leaving only minimal work to the designers.The problem area (1) has been recognized as a research area for a long time but only in recent years, a skeleton of a usable technical foundation started emerging. In other words, there has long been the lack of fully general and yet easily analyzable distributed realtime program structures and also the lack of useful OS timing models. However, on the basis of the skeleton emerged, a rapid progress is expected in the future toward establishment of a full technical foundation. Therefore, time seems ripe also for launching new larger-scale attacks on the problem (2) on the basis of those recent developments in handling the problem (1). Challenging nature of the timing analysis of distributed real-time objectsEnsuring that the real-time distributed computer systems produced meet all the applicable hard deadlines is a big challenge. First of all, one cannot just rely on a certain number of test-runs of the implemented system since devising a test-case corresponding to the worst possible execution case is often very difficult. In determining the execution safety, i.e., the absence of the possibility of violating hard deadlines, an analysis of the source code and other design specifications along with descriptions of the chosen execution environment, is an inevitable approach. Then, the contributions of an OS and message communication facilities to the system response time are often difficult to determine with good accuracy.General-purpose OSs have long been known to show unpredictable timing behavior. On the other hand, specialized real-time OSs have been showing continuous improvements in predictable timing behavior. This improvement will continue for years to come and moreover, will influence the evolution of general-purpose OSs as well.Moreover, in recent years, the understanding about idealistic structures for real-time OS kernels and middleware that yield easy and systematic analysis of their worst-case service times, has been expanded substantially. Our experiences indicate that even a popular commercial general-purpose OS such as Windows NT can be configured and extended with middleware to approach the idealistic structure to a ...

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