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    SubjectRe: Versioning File Systems?
    On Thu, Apr 18, 2002 at 07:19:47PM -0400, Stevie O wrote:
    > At 08:20 AM 4/18/2002 -0700, Larry McVoy wrote:
    > >It's certainly a fun space, file system hacking is always fun. There
    > >doesn't seem to be a good match between file system operations and
    > >SCM operations, especially stuff like checkin. write != checkin.
    > >But you can handle that with
    > How about
    > fsync(fd) || close(fd) == checkin?

    Source management systems usually work much better given explicit
    control for the user.

    ClearCase has MVFS to do what is being suggested. Compare:

    cat a.c # currently selected version of a.c
    cat a.c@@/main/5 # version 5 on the main branch

    cat a.c@@LINUX_2.4.18 # the version of a.c selected by the
    # label 'LINUX_2.4.18'

    Having a file system that implicitly performs these operations is
    not very useful.

    mark

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