Dynamic File System Migration for Energy Efficient Storage Management

Existing computer systems do not allow the user to access the system when turning off the disk containing the OS for saving energy. Thus existing studies have focused on devising effective disk spin up/down schemes. This paper proposes the scheme to keep on providing limited services as well as to improve the energy consumption in computer system. To do so, we employ the method that moves the root file system of the HDD to a RAM disk, in order to be able to access the system even in the case of a power-down of the disk containing the OS. Also, we realize the autonomic system migration by judging the system activity -- the CPU and user activity. By doing so the power management system can reduce the power more remarkably than in existing systems, and in experimental evaluation we could save power consumption of 8.1-14.4%.