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    SubjectRe: file as a directory
    Peter Foldiak wrote:

    >On Tue, 2005-05-10 at 16:14, Valdis.Kletnieks@vt.edu wrote:
    >
    >
    >>On Tue, 10 May 2005 10:39:23 BST, Peter Foldiak said:
    >>
    >>
    >>>Back in November 2004, I suggested on the linux-kernel and reiserfs
    >>>lists that the Reiser4 architecture could allow us to abolish the
    >>>unnatural naming distinction between directories/files/parts-of-file
    >>>(i.e. to unify naming within-file-system and within-file naming) in an
    >>>efficient way.
    >>>I suggested that one way of doing that would be to extend XPath-like
    >>>selection syntax above the (XML) file level.
    >>>
    >>>
    >>I believe the consensus was that this needs to happen at the VFS layer, not
    >>the FS level. The next step would be designing an API for this - what would
    >>the VFS present to userspace, and in what way, and how would backward
    >>combatability be maintained?
    >>
    >>
    >
    >But can it be done efficiently above the file system level??
    >
    >As far as I understand, Reiser4 has this nice tree structure, which
    >means that the part of file selection could be done with almost no extra
    >effort, you just attach additional names to inside nodes of the tree, so
    >the same tree can be used to store the whole object, and part of the
    >same tree can be used to select the object part. Right?
    >If you do this above the file system level, I don't think it would have
    >such an efficient implementation. Or would it? Peter
    >
    >
    The tree structure Peter speaks of is a storage layer entity, and so I
    think Peter's argument is not correct, but what Reiser4 also has is a
    plugin architecture, and it would be much easier to code it if we use
    the plugin architecture.

    Hans
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