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In order to meet the increasing demands of present and upcoming data-intensive computer applications, there has been a major shift in the disk subsystem, which now consists of more disks with higher storage capacities and higher rotational speeds. These have made the disk subsystem a major consumer of power, making disk power management an important issue. People have considered the option of spinning...
Confidentiality of disk-resident data is critical for end-to-end security of storage systems. While there are several widely used mechanisms for ensuring confidentiality of data in transit, techniques for providing confidentiality when data is stored in a disk subsystem are relatively new. As opposed to prior file system based approaches to this problem, this paper proposes an application-level solution,...
Disk subsystem is known to be a major contributor to the overall power budget of large-scale parallel systems. Most scientific applications today rely heavily on disk I/O for out-of-core computations, checkpointing, and visualization of data. To reduce excess energy consumption on disk system, prior studies proposed several hardware or OS-based disk power management schemes. While such schemes have...
Power consumption of disk systems is an important issue in scientific computing where data-intensive applications exercise disk storage extensively. While one can spin down idle disks when idleness is detected, spinning up them takes many cycles and consumes extra power. Therefore, it can be very useful in practice to improve disk reuse, that is, using the same set of disks as much as possible. If...
Disk subsystem is known to be a major contributor to overall power consumption of high-end parallel systems. Past research proposed several architectural-level techniques to reduce disk power by taking advantage of idle periods experienced by disks. Although such techniques have been known to be effective in certain cases, they share a common drawback: they operate in a reactive manner, i.e., they...
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