Abstract: The key issues related to the organization of the infrastructure of cloud technologies are considered. The main types of «clouds» and the principles of their work are described, the main approaches to ensuring the resiliency of cloud systems, including features of methods for restoring the system after failures based on the preservation of process states, are shown. The question of a comprehensive assessment of the reliability of the cloud computing infrastructure is formulated, the main problems and merits of the "cloud computing" are indicated. Results achieved: the main aspects of the functioning of providers and consumers of cloud computing services are described, the features of their interrelations and the systemic nature of the issue are shown. The task of complex assessment of the reliability of the relevant infrastructure is formulated.
Index terms: infrastructure, cloud computing, data centers, fault tolerance, reliability, virtualization


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