An Approach to Evaluate the Reliability of Web Applications in Cloud Computing Using Dynamic Fault Trees

Nowadays, one of the main challenges in developing different systems is obtaining reliable ones. So, preliminary studies of problematic atomic components which convert the system from reliable to unreliable need to be done. This paper is focused in evaluating one of the nonfunctional characteristics like the reliability of web applications in cloud environment. Nonfunctional characteristics such as reliability, security and availability of a web service application and hence its service components play an important role in evaluating the system performance of the web application. The paper proposes a Dynamic Fault Tree analysis of applications ran on cloud platform. As a case study in order to demonstrate the feasibility of this approach is used online payment system in e-commerce hosted on a cloud platform. The results obtained reveal that this is a good way in studying the reliability of the systems. Under specific system conditions with minimal functional resources on the cloud platform, cloud impact on system unreliability is nearly twice the impact of application type.