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Energy-Efficient Computing for Storage Sub-system

Author: ZuoShaoBin
Tutor: YangLiangHuai
School: Zhejiang University of Technology
Course: Applied Computer Technology
Keywords: Energy efficiency of computing Storage systems Flash Disk Block File
CLC: TP333
Type: Master's thesis
Year: 2011
Downloads: 9
Quote: 0
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Abstract


The energy consumption of the storage subsystem in the computer system, occupy a large proportion, to reduce the energy consumption of the storage subsystem has a very important significance for reducing the energy consumption of the entire system; the same time, the performance of the storage system is the whole computer system performance one of the bottlenecks. Therefore, the energy efficiency of the storage subsystem to become noteworthy research topic. Energy efficiency in the storage subsystem, has been a series of studies, including a variety of energy-saving measures, strategies and algorithms. Already are purely from the point of view of energy saving, comprehensive study failed to combine performance. The emergence of a new type of storage media - SSD energy efficiency to improve the system provides the opportunity. In view of this, the energy-saving algorithm combined with solid-state disk storage subsystems, disk block and file size scheduling to reduce energy consumption at the same time, a substantial increase in the performance of the storage system. The main contribution of the present study are as follows: 1. Using a solid state disk as a cache, forming the \The main idea is that the cache access \In addition, nationals from the performance advantages of solid-state disk, the 'heterogeneous disk \In order to improve the cache hit ratio, this paper proposes attenuation - Enhanced replacement algorithm. Storage track (traces) carried out a series of experiments show that the proposed scheme, the two types of tracking experiments, read and write rates of about 265% and 25%, average energy consumption reduced by about 28%. Application scenarios for access to the entire file by combining the solid-state disk and disk, the frequently used files migrated to SSDs to extend the time of the hard disk is idle, and then turn off the disk to save energy. Secondly, the \the critical value, the next state based on the historical data using an exponential average predicting disk at the same time, so that the the disk effective and reasonable to switch between a variety of working conditions, reduce the energy consumption of the disk subsystem. The experiments show that the proposed scheme effectively enhance system performance, average access delay than the original reduction of approximately 75%. At the same time, reducing storage system energy consumption up to 40 percent.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Electronic digital computer (not a continuous role in computer ) > Memory
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