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    SubjectRe: [kernel.org users] XZ Migration discussion
    On 02/16/2010 09:55 AM, Luck, Tony wrote:
    >
    >>> How hard a requirement is this? It might be the right time to
    >>> reconsider... Tony's plan may not be perfect but overall I think I like
    >>> it.
    >>>
    >>
    >> It's pretty darn hard. It makes it particularly messy for the mirrors
    >> to ignore it.
    >
    > Sometimes hard things are worth the effort though. I would think that
    > there would be considerable advantage to a mirror system that had a
    > mechanism to mark entire subtrees as "archive only - no further changes".
    >

    There are a couple of reasons to not do that.

    a) the moment we do that, some mirrors will start purging those areas.
    We have tried to keep our mirror system universally usable by keeping a
    "whole mirrors only, please" policy, and it has worked really well so far.

    b) it would prevent us from *ever* reorganizing those areas, as many be
    required.

    c) it complicates a lot of the machinery, including the bits that allow
    mirrors to only carry some of the compression formats. That includes
    mirror-side configuration, which I'd really loathe to make anything more
    than very simple; mirror admins want things to work as hands-off and
    automatic as possible, with a minimum of setup. Having to learn the
    intricacies of each mirror target is just plain hell.

    -hpa



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