Performance Evaluation and Dependability Analysis for Open Source Cloud Computing

At present, many open source software are developed in all parts of the world, i.e., Firefox, Apache HTTP server, Linux, Android, etc. In particular, a cloud computing is an attracting attention as network service to share the computing resources, i.e., networks, servers, storage, applications, and services. This paper focuses on a cloud computing environment by using open source software such as OpenStack and Eucalyptus because of the unification management of data, and low cost. A new approach to software dependability assessment based on a jump diffusion model and stochastic differential equations in order to consider the interesting aspect of the numbers of components and users is proposed in this paper. In particular, several sensitivity analyses in terms of the proposed model parameters are shown in this paper. Also, sets of actual data are analyzed to show numerical examples of software dependability assessment considering such characteristics of cloud computing environment.