  Virtual Data Center (VDC) embedding has drawn significant attention recently
because of growing need for efficient and flexible means of Data Center (DC)
resource allocation. Existing studies on VDC embedding mainly focus on
improving DCs' resource utilization. However, an important problem that has not
been considered in VDC embedding solutions is the creation of hot spots by
excessive heat dissipation and hot air generation from racks in DCs, which have
significant adverse effect on energy consumption of the cooling system and IT
equipment lifespan. To address this issue, we propose a temperature-aware VDC
embedding scheme to avoid hot spots by minimizing the maximum temperature of
hot air emitted from each rack. Meanwhile, we also aim to reduce the total
power consumption of IT equipment in this scheme. A Mixed Integer Linear
Programming (MILP) model and a heuristic algorithm are developed to implement
the proposed VDC embedding scheme. Numerical results show that the proposed
temperature-aware embedding scheme can significantly outperforms a
load-balanced embedding scheme in terms of maximum rack temperature, total
power consumption of IT equipment, and VDC rejection ratio.
