Vyacheslav S. Kharchenko

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Exception handling is one of the popular means used for improving dependability and supporting recovery in the Service-Oriented Architecture (SOA). This practical experience paper presents the results of error and fault injection into Web Services. We summarize our experiments with the SOA-specific exception handling features provided by the two development(More)
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(More)
Dependability and security analysis of the industrial control computer-based systems (ICS) is an open problem. ICS is a complex system that as a rule consists of two levels – supervisory control and data acquisition (SCADA) and programmable logic controllers (PLC) and has vulnerabilities on both levels. This paper presents results of the SCADA-based ICS(More)
How dependability is to be assessed and ensured during Web Service operation and how unbiased and trusted mechanisms supporting this are to be developed are still open issues. This paper addresses the following questions: who should publish dependability parameters, in which way they should be distributed, and who (and how) should monitor these parameters(More)
The multi-version approach to the system design is becoming a standard for the critical applications as it allows decreasing the probability of common mode failure. The main idea of this approach is to obtain the least correlated versions of the same project. The effective way to satisfy this requirement is to combine classical and non-classical approaches(More)
Exception handling isone of the powerfulm eansof achievingh igh dependability andfault-tolerance in service-oriented architecture(SOA). The paper introducesthe results of experimental analysisof the SOA-specificexceptionsand factors affecting availability and fault-tolerance of WebS ervices,i mplemented by useo fd ifferentdevelopmentkits.W ed iscovered(More)
In this paper we present our practical experience in benchmarking a number of existing Web Services, and investigating the instability of their performance and the delays induced by the communication medium. We provide the results of statistical data analysis and discuss a technique of Web Services performance assessment taking out of the network delays. We(More)