Some Conservative Stopping Rules for the Operational Testing of Safety-Critical Software
IEEE Transactions on Software Engineering
Highly reliable upgrading of components
Proceedings of the 21st international conference on Software engineering
Coverage Estimation Methods for Stratified Fault-Injection
IEEE Transactions on Computers
Dependable On-Line Upgrading of Distributed Systems
COMPSAC '02 Proceedings of the 26th International Computer Software and Applications Conference on Prolonging Software Life: Development and Redevelopment
Whither Generic Recovery from Application Faults? A Fault Study using Open-Source Software
DSN '00 Proceedings of the 2000 International Conference on Dependable Systems and Networks (formerly FTCS-30 and DCCA-8)
Diversity against Accidental and Deliberate Faults
CSDA '98 Proceedings of the Conference on Computer Security, Dependability, and Assurance: From Needs to Solutions
DeW: A Dependable Web Services Framework
RIDE '04 Proceedings of the 14th International Workshop on Research Issues on Data Engineering: Web Services for E-Commerce and E-Government Applications (RIDE'04)
Basic Concepts and Taxonomy of Dependable and Secure Computing
IEEE Transactions on Dependable and Secure Computing
Dependability in the web services architecture
Architecting dependable systems
Using Inherent Service Redundancy and Diversity to Ensure Web Services Dependability
Methods, Models and Tools for Fault Tolerance
Ecotopia: an ecological framework for change management in distributed systems
Architecting dependable systems IV
F(I)MEA-technique of web services analysis and dependability ensuring
Rigorous Development of Complex Fault-Tolerant Systems
A systematic review of design diversity-based solutions for fault-tolerant SOAs
Proceedings of the 17th International Conference on Evaluation and Assessment in Software Engineering
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Achieving high dependability of Web Services (WSs) dynamically composed from component WSs is an open problem. One of the main difficulties here is due to the fact that the component WSs can and will be upgraded online, which will affect the dependability of the composite WS. The paper introduces the problem of component WS upgrade and proposes solutions for dependable upgrading in which natural redundancy, formed by the latest and the previous releases of a WS being kept operational, is used. The paper describes how ‘confidence in correctness’ can be systematically used as a measure of dependability of both the component and the composite WSs. We discuss architectures for a composite WS in which the upgrade of the component WS is managed by switching the composite WS from using the old release of the component WS to using its newer release only when the confidence is high enough, so that the composite service dependability will not deteriorate as a result of the switch. The effectiveness of the proposed solutions is assessed by simulation. We discuss the implications of the proposed architectures, including ways of ‘publishing’ the confidence in WSs, in the context of relevant standard technologies, such as WSDL, UDDI and SOAP.