Power effective file layout with application support in virtualized environment

In data centers, huge amount of computes are running. These computes consume enormous energy. For this issue, several challenges were published. An energy efficient storage management cooperated with applications was one of effective approaches. With this method, data and storage devices are managed with application supports and power consumption of storage devices is significantly decreased. However, the existing works do not take account of virtualized environment. Recently, many data intensive applications run in virtualized environment, such as cloud computing environment. In this paper, we focus on virtualized environment wherein plural virtual machines run on a physical computer and a data intensive application runs on each virtual machine. We discuss a method for saving storage device power consumption with application support. First, we propose two storage managing methods using application information. One method optimizes file layout inter-HDDs. The other method optimizes file layout inside-HDD in addition to inter-HDD optimization. Second, we present our experimental result and demonstrate that the proposed methods can create long HDD access intervals enough to bring these to power-off mode and save power consumption of storage devices.