Abstract
Demand for power saving of data centers in Japan becomes higher owing to the electric power shortage after the Tohoku Earthquake. Consolidation of the workload into a smaller number of computing resources by VM migration and turning servers on and off as needed are very effective to save the total power consumption of data center. However the power switching control of servers is not directly applied to almost any current data center because of the risk of SLA(service level agreement) violation. To keep SLA, verification, covering all possible situations, is needed, and it can be done only by precise and realistic simulation of data center. In this paper, we propose a data center simulator which emulates the whole data center including all IT instruments of servers, storages as well as switches etc., and non IT instruments such as cooling and power devices as well as lighting system. Based on this simulator, we can precisely examine almost any realistic scenario of data center resource management such as optimized VM allocation and migration coupled with facility cooling control, aiming at the pursuit of minimum power consumption of the whole data center compatible with SLA.
