eRAID: Conserving energy in conventional disk-based RAID system

    Authors

    J. Wang; H. J. Zhu;D. Li

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    IEEE Trans. Comput.

    Keywords

    energy efficiency; power; disk; RAID; queuing model; storage; redundancy; PERFORMANCE; ARRAYS; Computer Science, Hardware & Architecture; Engineering, Electrical &; Electronic

    Abstract

    Recently, high-energy consumption has become a serious concern for both storage servers and data centers. Recent research studies have utilized the short transition times of multispeed disks to decrease energy consumption. Manufacturing challenges and costs have so far prevented commercial deployment of multispeed disks. In this paper, we propose an energy saving policy, eRAID (energy-efficient RAID), for conventional disk-based mirrored and parity redundant disk array architectures. eRAID saves energy by spinning down partial or the entire mirror disk group with constraints of acceptable performance degradation. We first develop a multiconstraint energy-saving model for the RAID environment by considering both disk characteristics and workload features. Then, we develop a performance ( response time and throughput) control scheme for eRAID based on the analytical model. Experimental results show that eRAID can save up to 32 percent energy while satisfying the predefined performance requirement.

    Journal Title

    Ieee Transactions on Computers

    Volume

    57

    Issue/Number

    3

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    359

    Last Page

    374

    WOS Identifier

    WOS:000252471400006

    ISSN

    0018-9340

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