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    SubjectRe: defrag deployment status (was Re: [PATCH] ext4: allow defrag (EXT4_IOC_MOVE_EXT) in 32bit compat mode)
    Christian Borntraeger wrote:
    > Some bigger things are missing in the e4defrag tool:
    > ...
    > - overall layout considerations (e.g. putting files close to its directory or
    > use the atime to move often used files to the beginning of a disk etc.)

    Shouldn't oft-used files be placed closer to the middle? If you place
    them at the beginning of the file, it's only possible for the head-stack
    to be close to the file from the inner direction. Place them in the
    middle and it's possible for the head-stack to be close from the outer
    direction, too, which sounds like a doubling of probability. It seems
    that it's the least frequently used files that should be placed at one
    end of the disk or the other.


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