Date Added: May 2012
Dynamic Voltage and Frequency Scaling (DVFS) has been a useful power management strategy in embedded systems, mobile devices, and wireless sensor networks. Recently, it has also been proposed for servers and data centers in conjunction with service consolidation and optimal resource-pool sizing. In this paper, the authors experimentally investigate the scope and usefulness of DVFS in a server environment. They set up a multimedia server which will be used in two different scenarios. In the first scenario, the server will host requests to download video files of known and available formats. In the second scenario, videos of unavailable formats can be accepted; in which case the server employs a transcoder to convert between AVI, MPEG and SLV formats before the videos are downloaded.