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    SubjectRe: Ext3 vs NTFS performance
    Cabot, Mason B wrote:
    > I've been testing the NAS performance of ext3/Openfiler 2.2 against
    > NTFS/WinXP and have found that NTFS significantly outperforms ext3 for
    > video workloads. The Windows CIFS client will attempt a poor-man's
    > pre-allocation of the file on the server by sending 1-byte writes at
    > 128K-byte strides, breaking block allocation on ext3 and leading to
    > fragmentation and poor performance. This will happen for many
    > applications (including iTunes) as the CIFS client issues these
    > pre-allocates under the application layer.

    This is rather hard to believe so I think some more information is in
    order. Specifically, how do you know that it is the windows kernel that
    is issuing these writes and not the application? Under what application
    access patterns does it do this?

    This is just rather hard to believe seeing as how, iirc, the CIFS
    protocol has commands to extend the file size properly rather than with
    this hack, and unless it is asked to by the application, the cifs client
    should not be trying to extend files.

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      Last update: 2007-05-04 20:59    [W:0.021 / U:4.596 seconds]
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