How migrating 0.0001% of address space saves 12% of energy in hybrid storage

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    Abstract

    We present a simple, operating- system independent method to reduce the num- ber of seek operations and consequently reduce the energy consumption of a hybrid storage device consisting of a hard disk and a flash memory. Trace-driven simulations show that migrating a tiny amount of the address space (0.0001%) from disk to flash already results in a signi��?cant storage energy reduction (12%) at virtually no extra cost. We show that the amount of energy saving depends on which part of the address space is migrated, and we present two indicators for this, namely sequentiality and request frequency. Our simulations show that both are suitable as criterion for energy-saving ��?le placement methods in hybrid storage. We address potential wear problems in the flash subsystem by presenting a simple way to pro- long its expected lifetime.
    Original languageUndefined
    Place of PublicationEnschede
    PublisherDistributed and Embedded Security (DIES)
    Number of pages15
    Publication statusPublished - 11 Sep 2007

    Publication series

    Name
    PublisherCentre for Telematics and Information Technology, University of Twente
    No.274/A4TR-2007.1
    ISSN (Print)1381-3625

    Keywords

    • SCS-Cybersecurity
    • IR-64809
    • METIS-251005
    • EWI-12874

    Cite this

    van der Zwaag, B. J., Khatib, M. G., & Hartel, P. H. (2007). How migrating 0.0001% of address space saves 12% of energy in hybrid storage. Enschede: Distributed and Embedded Security (DIES).