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    SubjectRe: Versioning file system
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    >The directory is quite visible with a standard 'ls -a'. Instead,
    >they simply mark it as a separate volume/filesystem: i.e. the fsid
    >differs when you call stat(). The whole thing ends up acting rather like
    >our bind mounts.

    Hmm. So it breaks user space quite a bit. By break, I mean uses that
    work with more conventional filesystems stop working if you switch to
    NetAp. Most programs that operate on directory trees willingly cross
    filesystems, right? Even ones that give you an option, such as GNU cp,
    don't by default.

    But if the implementation is, as described, wildly successful, that means
    users are willing to tolerate this level of breakage, so it could be used
    for versioning too.

    But I think I'd rather see a truly hidden directory for this (visible only
    when looked up explicitly).

    --
    Bryan Henderson IBM Almaden Research Center
    San Jose CA Filesystems

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