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Application of OpenStack in Chinese Spallation Neutron Source computing system

The requirements of computing and storage for High Energy physics experiments are growing rapidly with the expansion of the scale of experiments, the forthcoming completion of Chinese Spallation Neutron Source(CSNS) has also higher requirements for computing system. The new computing pattern, cloud computing, can make IT resources configuration flexible and management centralized. So from the research and practice aspects, firstly, the application status of cloud computing science in High Energy Physics Experiments are introduced in this paper. Secondly, the special requirements of CSNS are discussed further. Thirdly, the design and practice of cloud computing platform based on OpenStack are mainly demonstrated from the aspects of cloud computing system framework, storage system, application of OpenStack, etc. Finally, some future prospects of CSNS cloud computing system are summarized in the ending of this paper.