Dealing with Uncertainty to Ensure Open System Dependability
- Day - Time: 05 October 2011, h.11:00
- Place: Area della Ricerca CNR di Pisa - Room: C-40
- Anatoliy Gorbenko (Department of Computer Systems and Networks (503) National Aerospace University "KhAI", Kharkiv, Ukraine)
Dealing with uncertainty inherent in the very nature of service-oriented architectures, is one of the main challenges in building dependable service architectures. This uncertainty needs to be treated as a threat in a way similar to and in addition to faults, errors and failures, traditionally dealt with by the research community. The lack of sufficient evidence about the characteristics of the communication medium, components and their possible dependencies makes it extremely difficult to achieve and predict (composite) service dependability which can vary over a wide range in a very random manner. This uncertainty of services running over the Internet and clouds exhibits itself through the unpredictable response times of messages and data transfers, difficulty to diagnose the root cause of failures, unknown common mode failures, etc.