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    SubjectRe: Streaming disk I/O kills file buffering and makes Linux unusable
    > Will future kernels ave an O_DIRECT like flag to avoid caching ?

    Stephen Tweedie has written a patch for unbuffered I/O; the URL I have
    from some time ago is

    ftp://ftp.linux.org.uk/pub/linux/sct/fs/raw-io

    though this host doesn't seem to respond at the moment. I believe
    Stephen has mentioned that this will go into the main tree at some point.
    (Possibly it's already in 2.3.x---I haven't looked recently.)

    > I think without some buffer-cache usage limiting, or buffering disabling,
    > Linux is actually UNSUITABLE for streaming applications which do run
    > concurrently with other apps.

    I agree; the raw-io system will make this much more pleasant.

    Cheers,
    Peter Monta pmonta@imedia.com
    Imedia Corp.

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