Contemporary megawatt-scale data centers have emerged to meet the increasing demand for online cloud services and big analytics. However, in such large-scale centers, servers of different generations are installed gradually year by year, making center heterogeneous computing capability energy efficiency. Furthermore, due processor architectures, complex diverse load dynamic changing, business c...

Workload consolidation is an important method for the efficient operation of cloud data centers, impacting quality attributes such as resource utilization and power consumption. Many different approaches have been proposed workload consolidation, but few comparative studies were executed to date. Therefore, it unclear which work best in situation. In this article, we present a comprehensive sim...