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Cloud Data Centers Energy Consumption
Introduction Cloud computing has proven to be a very promising paradigm for the past decade for both consumers andproviders in various fields, such as engineering, science and business. Based on pay-as-you-go model, is offering utility-oriented IT services to users worldwide. These services are provided in different forms which include Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a service (SaaS). This has led to the construction of large-scale computing data centers consuming enormous amounts of electrical power. Despite of the improvements in energy efficiency of the hardware, overall energy consumption continues to grow due to increasing requirements for computing resources. Apart from the overwhelming operational costs, building a data center leads to excessive establishment expenses as data centers are usually built to serve infrequent peak loads resulting in high power consumption and low average utilization of the resources. In addition, high power consumption by the infrastructure leads to substantial carbon footprints contributing to the greenhouse effect.