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Top1. Introduction
In the development of information industry, as users and data increase, energy efficiency has become a prominent contradiction. How to effectively reduce carbon emissions and save cost, which have become increasingly concerned about the problem of operators. As the carrier of cloud computing services, green data center is a typical application of energy efficiency communications. In the era of big data, multimedia technology has become more and more mature. Multimedia big data is a new hot topic, gradually goes into the human vision. Under the premise of optimizing energy consumption, how to quickly and accurately carry out big data mining is the key problem to be solved. Resource allocation, load balancing, energy consumption optimization, high recognition rate, these are the focus of the study of multimedia big data. Multimedia images, multimedia video, and multimedia audio, which are affecting the performance of large data mining algorithms. In the context of cloud computing era, data centers need to focus on large-scale sharing platform to promote. In addition, the data center should be able to achieve real-time dynamic expansion, self - and automatic deployment services.
Due to the needs of the business, the data center is becoming more and denser, with more and more energy consumption and efficiency problems, which leads to the increasing cost of enterprise users. Therefore, the concept of green data center is the need of social development, but also the need of more efficient IT industry. Green data center is the inevitable development of the data center, but also the crystallization of environmental awareness and scientific and technological development. With the development of cloud computing technology, the data center as the core of cloud computing has also developed rapidly. In order to reduce energy consumption and save cost, green data center becomes the inevitable trend of data center development. Energy problems are becoming more and more serious with the growing size of data center (Xiang & Chuang et al., 2014). The overarching concept of delivering computing resources through a global network is rooted in the sixties. Cloud computing is a kind of computing model which can use the Internet to access the shared resource pool (such as computing facilities, storage devices, applications, etc.) anytime, anywhere. Cloud computing has evolved through a number of phases which include distributed computing, parallel computing, utility computing and grid computing. It is clear that cloud computing can bring enormous benefits for computer users (Toni & Ivona, 2015). Green cloud computing is a combination of green communications and cloud computing technology and its main goal is to improve the computing capability of the data centers and reduce carbon dioxide emissions (Liu & Shu et al., 2013). Energy consumption has become a significant concern for cloud service providers due to operating costs and environmental impact. Figure 1 shows the simulation structure of global data center.
Figure 1. Simulation Structure of Global Data Center
Cloud computing is a super computing model for the collaborative computing, which is powered by large data centers, large scale storage, high-bandwidth networks, and other distributed computing resources. Therefore, there are a huge number of servers that need to be managed efficiently in data centers. Green cloud computing is emerging as a new computing paradigm that aims to manage energy consumption efficiency in cloud data centers (Fallahpour & Beyranvand et al., 2015). Green cloud computing can not only effectively improve the utilization of cloud computing infrastructure, but also minimize energy consumption. The services offered by the cloud computing paradigm have unique characteristics that distinguish them from traditional services, giving rise to new challenges and opportunities when it comes to developing resource-aware allocation techniques for cloud data centers (Ge & Huang et al., 2014). With the rapid growth of data centers, energy efficiency has become prominent contradiction in green cloud computing. However, the reduction of energy consumption may cause delay of service response. Therefore, we need to find an optimal tradeoff between energy consumption and performance, so as to reduce the impact on the data center.