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A Comparative Study of OpenStack and CloudStack

Even though of its very recent origins, Cloud Computing has matured into a main stream technology over the past few years. Private cloud, where an organization sets up an internal cloud infrastructure, is gaining traction these days because of its perceived security advantages. Two of the major open source cloud middlewares are OpenStack and CloudStack. This paper provides a comparative study of these two cloud middlewares regarding its implementation complexity, overall stability and performance comparison using Unixbench and Bonnie++ benchmarks. Experiment results show that OpenStack perform better in most scenarios in a single node environment. OpenStack exhibits better overall stability but at the cost of increased installation complexity.