Current Search: Fernandez, Eduardo B. (x) » Computer software--Reliability (x)
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Title
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The design of reliable decentralized computer systems.
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Creator
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Wu, Jie., Florida Atlantic University, Fernandez, Eduardo B., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
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Abstract/Description
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With the increase in the applications of computer technology, there are more and more demands for the use of computer systems in the area of real-time applications and critical systems. Reliability and performance are fundamental design requirements for these applications. In this dissertation, we develop some specific aspects of a fault-tolerant decentralized system architecture. This system can execute concurrent processes and it is composed of processing elements that have only local...
Show moreWith the increase in the applications of computer technology, there are more and more demands for the use of computer systems in the area of real-time applications and critical systems. Reliability and performance are fundamental design requirements for these applications. In this dissertation, we develop some specific aspects of a fault-tolerant decentralized system architecture. This system can execute concurrent processes and it is composed of processing elements that have only local memories with point-to-point communication. A model using hierarchical layers describes this system. Fault tolerance techniques are discussed for the applications, software, operating system, and hardware layers of the model. Scheduling of communicating tasks to increase performance is also addressed. Some special problems such as the Byzantine Generals problem are considered. We have shown that, by combining reliable techniques on different layers and with consideration of system performance, one can provide a system with a very high level reliability as well as performance.
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Date Issued
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1989
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PURL
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http://purl.flvc.org/fcla/dt/12237
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Subject Headings
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Electronic digital computers--Reliability, Fault-tolerant computing, System design, Computer software--Reliability
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Format
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Document (PDF)
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Title
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Reliability modeling of fault-tolerant software.
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Creator
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Leu, Shao-Wei., Florida Atlantic University, Fernandez, Eduardo B., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
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Abstract/Description
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We have developed reliability models for a variety of fault-tolerant software constructs including those based on two well-known methodologies: recovery block and N-version programming, and their variations. We also developed models for the conversation scheme which provides fault tolerance for concurrent software and a newly proposed system architecture, the recovery metaprogram, which attempts to unify most of the existing fault-tolerant strategies. Each model is evaluated using either GSPN...
Show moreWe have developed reliability models for a variety of fault-tolerant software constructs including those based on two well-known methodologies: recovery block and N-version programming, and their variations. We also developed models for the conversation scheme which provides fault tolerance for concurrent software and a newly proposed system architecture, the recovery metaprogram, which attempts to unify most of the existing fault-tolerant strategies. Each model is evaluated using either GSPN, a software package based on Generalized Stochastic Petri Nets, or Sharpe, an evaluation tool for Markov models. The numerical results are then analyzed and compared. Major results derived from this process include the identification of critical parameters for each model, the comparisons of relative performance among different software constructs, the justification of a preliminary approach to the modeling of complex conversations, and the justification of recovery metaprogram regarding improvement of reliability.
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Date Issued
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1990
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PURL
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http://purl.flvc.org/fcla/dt/12256
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Subject Headings
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Fault-tolerant computing, Computer software--Reliability
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Format
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Document (PDF)
