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    SubjectRe: [PATCH 06/10] AXFS: axfs_super.c
    Arnd Bergmann wrote:
    > On Friday 22 August 2008, Jared Hulbert wrote:
    >>> This implies for block devices that the entire filesystem metadata has to be
    >>> cached in RAM. This severely limits the size of AXFS filesystems when using
    >>> block devices, or the else memory usage will be excessive.
    >> This is where 64bit squashfs could be a better fit.
    >
    > Is this the only place where squashfs has a significant advantage?
    > If so, you might want to change it in axfs eventually to make the
    > decision easier for users ;-)

    As you asked here's the list.

    1. Support for > 4GB filesystems. In theory 2^64 bytes.
    2. Compressed metadata
    3. Inode timestamps
    4. Hard-link support, and correct nlink counts
    5. Sparse file support
    6. Support for ". & ".." in readdir
    7. Indexed directories for fast lookup
    8. NFS exporting
    9. No need to cache entire metadata in memory

    Squashfs has been optimised for block-based rotating media like hard
    disks, CDROMS. AXFS has been optimised for flash based media. Squashfs
    will outperform AXFS on rotating media, AXFS will outperform Squashfs on
    flash based media.

    Squashfs and AXFS should be seen as complementary filesystems, and there
    should be room in the Linux kernel for both.

    I don't see what your problem is here. I think AXFS is an extremely
    good filesystem and should be merged. But I don't see why this should
    lead to more Squashfs bashing.

    Phillip


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