Performance and Energy Consumption Evaluation of Hybrid Storage Systems

In data centers, storage devices have a great contribution on energy consumption and, to mitigate this issue, hybrid storage architectures have been conceived to balance acquisition cost (hard disk drives) and energy utilization (solid-state drives). Some works evaluate the performance of storage architectures, but energy consumption is usually neglected and not simultaneously evaluated with performance. This paper presents an assessment of performance and energy consumption of storage devices and hybrid mechanisms in order to provide insights about the benefits of each technology. Also, a workload evaluation is presented to assist the conception of an optimized data-placement policy for hybrid storage systems.