The author uses the scientific method to deduce specific behavior and to target, analyze, extract and modify specific operations of a program for interoperability purposes. Abstract fault tolerance is the survival attribute of a system or component to continue operating as required despite the manifestation of. With the increasing size and complexity of software in embedded systems, software has now become a primary threat for the reliability. Please cite the book properly in resulted publications. The author next briefly describes these techniques and examines how they deal with failures and related faults. The concept of nversion programming was introduced in 1977 by liming chen and algirdas. Handbook of software reliability engineering michael r. A tutorial, 2000 nasa report, available online the ideas of masking redundancy, standby redundancy, and selfchecking design have been shown to be applicable to software, leading to various types of faulttolerant software flaw tolerance is a better term. We separate all faults within nvp systems into independent faults and common faults, and model each type of failure as nhpp. We conducted a major experiment to engage 34 programming teams to independently develop multiple software versions for an industryscale critical flight application, and collected faults. This chapter presents a nonhomogeneous poisson progress reliability model for nversion programming systems. Consequently, software reliability can be improved by treating software faults properly, using techniques of fault tolerance, fault removal, and fault prediction. Iyer and inhwan lee university of illinois at urbanachampaign abstract.
He is now a professor at the chinese university of hong kong in shatin, hong kong. Nasacr1 97999 nasacr197999 software fault n9524993 tolerance in computer operating systems illinois univ. The presented software fault tolerance techniques can be used at different levels of the system. Serviceoriented architecture soa provides an elastic and automatic way to discover, publish, and compose individual services.
Software fault tolerance techniques involve error detection, exception handling, monitoring mechanisms and. This important book also focuses on identification, application, formulation and evaluation of current software tolerance techniques. Dependability modeling for fault tolerant software and systems j. Jun 18, 2003 an incremental recovery cache supporting software fault tolerance, in reliable software technologiesadaeurope99, santander, spain, june 711, 1999, lecture notes in computer science 1622, pp. Software fault tolerance how is software fault tolerance. In the field of software fault tolerance we also offer a seminar that allows students to research on current topics and a computer lab to get handson experience for the mechanisms presented in the lecture. Since correctness and safety are really system level concepts, the need and degree to. Design diverse software fault tolerance techniques 5. Software testing and software fault tolerance are two major techniques for developing reliable software systems, yet limited empirical data are available in the literature to evaluate their effectiveness. Rogers p and wellings a the application of compiletime reflection to software fault tolerance using ada 95 proceedings of the 10th adaeurope international conference on reliable software technologies, 236.
In this paper, the authors apply software fault tolerance techniques for web services, where the component failures are handled by fault tolerance strategies. Software fault tolerance carnegie mellon university. Testing for reliability is achieved by faultremoval techniques that detect and correct software faults. Design for reliability is achieved by fault tolerance techniques that keep the system working in the presence of software faults. Exception handling and tolerance of software faults f. How are mission critical systems designed to handle system. Reliability evaluation of serviceoriented architecture. Software fault tolerance guide books acm digital library.
Proceedings of the 23rd international conference on machine. Apr 20, 2012 the complete text of software fault tolerance, written by michael r. The approaches to reliable software systems include fault prevention e. Zheng z and lyu m 20 personalized reliability prediction of web services, acm transactions on software engineering and methodology. Software architecture analysis methods aim to analyze the quality of software intensive system early at the software architecture design level and before a system is implemented.
Design diversity is the provision of software components. Research openaccess designingfaulttolerantsoabasedondesign. Commonly used fault tolerance requirement is expressed with minimum interarrival time tf between two successive faults or the reliability goal of ti. The study 29 shows that system and applications software can potentially detect and correct some or many of these errors by using different software fault tolerance approaches such as replication, voting, and masking with a focus on algorithmbased faulttolerance 7, 31,32,33,34,35,37 or by using a combined software and hardware approaches. Experimental evaluation of hardwaresoftware fault tolerance.
Michael is well known to the software engineering community as the editor of two classic book volumes in software reliability engineering. The purpose is to prevent catastrophic failure that could result from a single point of failure. Introduction to reverse engineering software by mike perry, nasko oskov uiuc an introduction to reverse engineering software under both linux and windows. Chapter 3 presents programming practices used in several software fault tolerance techniques, along with common problems and issues faced by various approaches to software fault tolerance. Designfault tolerance by means of design diversity is a concept that traces back to the very early age of informatics. Reliability oriented design methods and programming techniques 4. We conducted a major experiment to engage 34 programming teams to independently develop multiple software versions for an industryscale critical flight. Software fault tolerance is editted by by michael r. However, the unpredictable nature of soa systems introduces new. Avizienis, the methodology of nversion programming, in software fault tolerance, m. The book is intended for practitioners and researchers who are concerned with the dependability of software systems. Software fault tolerance professur fur systems engineering.
This value for interarrival time between faults is either derived from past system fault data or assumed to be the worst case value the system can cope with. Design pattern representation for safetycritical embedded systems. The need of software faulttolerance provisions located in the application layer is supported by studies that showed that the majority of failures experienced by nowadays computer systems are. Software fault tolerance is the ability of computer software to continue its normal operation despite the presence of system or hardware faults. Vmware vsphere 6 fault tolerance is a branded, continuous data availability architecture that exactly replicates a vmware virtual machine on an. Software engineering for internet applications by eve andersson, philip greenspun, andrew grumet the mit press after completing this course on serverbased internet applications software, students who start with only the knowledge of how to write and debug a computer program will have learned how to build webbased applications on the scale of. Optimal fault tolerance strategy selection for web services. His research interests include software reliability engineering, distributed systems, faulttolerant computing, and machine learning. An initial specification of the intended functionality of the software is developed. The complete text of software fault tolerance, written by michael r.
A faulttolerance approach to reliability of software operation, digest of eighth annual intl conf. Software fault tolerance techniques involve error detection. Software reliability is closely influenced by the creation, manifestation and impact of software faults. The primary software fault tolerance techniques include recovery blocks and nversion programming nvp covered in detail in lyu 1995. This chapter concentrates on software fault tolerance based on design diversity. Data diverse software fault tolerance techniques 6. As more and more complex systems get designed and built, especially safety critical systems, software fault tolerance and the next generation of hardware fault tolerance will need to evolve to be able to solve the design fault problem. Fault tolerant software systems using software configurations. His research interests include software reliability engineering, distributed systems, fault tolerant computing, and machine learning. Software fault tolerance how is software fault tolerance abbreviated. Since correctness and safety are really system level concepts, the need and degree to use software fault tolerance is directly dependent. Alzahrani n and petriu d modeling fault tolerance tactics with reusable aspects proceedings of the 11th international acm sigsoft conference on quality of software architectures, 4352 martin l, koziolek a and reussner r qualityoriented decision support for maintaining architectures of faulttolerant space systems proceedings of the 2015. Lyu, 1995, in the fastgrowing field of service computing, systematic and comprehensive studies on software fault tolerance techniques to transactional web services are still. Software fault tolerance refers to the use of techniques to increase the likelihood that the final design embodiment will produce correct andor safe outputs.
As more and more complex systems get designed and built, especially safety critical systems, software fault tolerance and the next generation of hardware fault tolerance will need to evolve to. In previous work, we conducted a software project with realworld application for investigation on software testing and fault tolerance for design diversity. In particular a complex system may be composed of some smaller components each comprising some fault detection and fault tolerance capabilities lyu, 1995. As software fault tolerance is often measured in terms of system availability. Alzahrani n and petriu d modeling fault tolerance tactics with reusable aspects proceedings of the 11th international acm sigsoft conference on quality of software architectures, 4352 martin l, koziolek a and reussner r qualityoriented decision support for maintaining architectures of fault tolerant space systems proceedings of the 2015. An empirical study on testing and fault tolerance for. Current methods for software fault tolerance include recovery blocks. Optimal fault tolerance strategy selection for web. Checkpoint placement for faulttolerant realtime systems.
The following software fault avoidance rules, as suggested by lyu, should be followed regardless of the type of installed software structure. Design fault tolerance by means of design diversity is a concept that traces back to the very early age of informatics. Software reliability engineering involves techniques for the design, testing and evaluation of software systems, focusing on reliability attributes. Several mature conventional reliability engineering techniques exist in literature but traditionally these have primarily addressed failures in hardware components and usually assume the availability of a running system. Optimal fault tolerance strategy selection for web services zibin zheng the chinese university of hong kong, china and michael r. Soa enables faster integration of existing software components from different parties, makes fault tolerance ft feasible, and is also one of the fundamentals of cloud computing. Software fault tolerance by design diversity 1995 citeseerx. Software fault tolerance and the handbook of software reliability engineering. Avizienis, the methodology of nversion programming. In this paper, a distributed fault tolerance strategy evaluation and selection framework is proposed based on versatile fault tolerance techniques. Chapter 11 in software fault tolerance, michael lyu, ed. Reliability and fault correlation are two main concerns for design diversity, yet empirical data are limited in investigating these two. Software fault tolerance free computer, programming.
Lyu the chinese university of hong kong, china source title. Dependability modeling for faulttolerant software and systems j. Software fault tolerance cmuece carnegie mellon university. Single version techniques focus on improving the fault tolerance of a. Textbook n no textbook n useful references n software fault tolerance techniques and implementation n laura pullum, artechhouse publishers, 2001, isbn 1 5805377 n software reliability engineering n michael r. Design for reliability is achieved by faulttolerance techniques that keep the system working in the presence of software faults. Software architecture reliability analysis using failure.
Fault prevention and fault tolerance techniques are leveraged in the development of large and reliable complex software systems. Fault tolerance also resolves potential service interruptions related to software or logic errors. International journal of web services research ijwsr 74. A unified view on learning with labeled and unlabeled data.
Avizienis, the methodology of nversion programming, in. Designing faulttolerant soa based on design diversity. An assumption of software fault tolerance techniques is that the probability of having the same fault in multiple variant components is lower, meaning that a fault present in a component should be detected and tolerated based on the behaviour of other variants lyu. From inside the book what people are saying write a. An incremental recovery cache supporting software fault tolerance, in reliable software technologiesadaeurope99, santander, spain, june 711, 1999, lecture notes in computer science 1622, pp. As a research project for my master degree i am working on a framework for fault injection testing distributed systems and i have been doing some reading around the s. Online shopping from a great selection at books store. The study 29 shows that system and applications software can potentially detect and correct some or many of these errors by using different software fault tolerance approaches such as replication, voting, and masking with a focus on algorithmbased fault tolerance 7, 31,32,33,34,35,37 or by using a combined software and hardware approaches. According to lyu 95, software is a systematic representation and processing of human knowledge. All requirements should be specified and analyzed with. Design, testing, and evaluation techniques for software.
Abstract fault tolerance is the survival attribute of a system or component to continue operating as required despite the manifestation of hardware or software faults. Software fault tolerance in computer operating systems. The adoption of software fault tolerance techniques based on design diversity has been advocated as a means of coping with residual software design faults in operational software lee and anderson 1990. Fault tolerant software has the ability to satisfy requirements despite failures. He is a fellow of the acm, the ieee, and the aaas, and a croucher senior research fellow for his contributions to software reliability engineering and software fault tolerance.
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