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    Duality Between Prefetching and Queued Writing with Parallel Disks

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    Issue Date
    2006-07-27
    Author
    Hutchinson, David A.
    Sanders, Peter
    Vitter, Jeffrey Scott
    Publisher
    Society for Industrial and Applied Mathematics
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    Parallel disks promise to be a cost effective means for achieving high bandwidth in applications involving massive data sets, but algorithms for parallel disks can be difficult to devise. To combat this problem, we define a useful and natural duality between writing to parallel disks and the seemingly more difficult problem of prefetching. We first explore this duality for applications involving read-once accesses using parallel disks. We get a simple linear time algorithm for computing optimal prefetch schedules and analyze the efficiency of the resulting schedules for randomly placed data and for arbitrary interleaved accesses to striped sequences. Duality also provides an optimal schedule for prefetching plus caching, where blocks can be accessed multiple times. Another application of this duality gives us the first parallel disk sorting algorithms that are provably optimal up to lower-order terms. One of these algorithms is a simple and practical variant of multiway mergesort, addressing a question that had been open for some time.
    Description
    This is the published version, made available with the permission of the publisher. Copyright © 2005 Society for Industrial and Applied Mathematics.
    URI
    http://hdl.handle.net/1808/18955
    DOI
    https://doi.org/10.1137/S0097539703431573
    Collections
    • Electrical Engineering and Computer Science Scholarly Works [302]
    Citation
    Hutchinson, David A., Peter Sanders, and Jeffrey Scott Vitter. "Duality Between Prefetching and Queued Writing with Parallel Disks." SIAM J. Comput. SIAM Journal on Computing 34.6 (2005): 1443-463. DOI:10.1137/S0097539703431573

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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