Date: Sun, 4 Sep 2011 18:36:55 +1000 From: Peter Jeremy <peterjeremy@acm.org> To: perryh@pluto.rain.com Cc: freebsd-arch@freebsd.org Subject: Re: Official git export Message-ID: <20110904083655.GA32801@server.vk2pj.dyndns.org> In-Reply-To: <4e62195b.cdaZfeF621ojSqVQ%perryh@pluto.rain.com> References: <4E5C364D.7070904@freebsd.org> <CAHM0Q_Mq3YEEpB6uNymjtd=WCQuTR6gd=71EsLxJf5J0ygyjiw@mail.gmail.com> <20110830201357.GB58638@acme.spoerlein.net> <4e5e458a.Un%2BVK0itRgItvxbf%perryh@pluto.rain.com> <20110831081815.GN2493@over-yonder.net> <4e5f2e26.6PQ5d6F3eauFfAcH%perryh@pluto.rain.com> <4E5F12B6.3090307@FreeBSD.org> <4e5fa001.BTxOKlcJfp7aZ2KE%perryh@pluto.rain.com> <4E5F4807.6070206@FreeBSD.org> <4e62195b.cdaZfeF621ojSqVQ%perryh@pluto.rain.com>
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On 2011-Sep-03 05:11:07 -0700, perryh@pluto.rain.com wrote:
>A few hundred MB of disk space is nothing. Having to _download_
>a few hundred MB of source code, that one already has, is _not_
>"nothing" unless one has a rather large pipe.
If you already have the source code, why would you be downloading
it again? Typically, if you keep a local copy of the repo, you
would be checking out from it, rather than using csup or similar.
>One way to mitigate this would be to provide the ability to
>download and install VCS metadata (back-deltas, commit comments,
>etc.) for particular files and directories "as needed".
Based on the description, I'll take "metadata" to mean the VCS
repository itself, rather than VCS-related metadata that is added
to a checked-out working directory.
Whilst this was fairly easy for CVS, it's not practical for SVN
because the metadata is stored per-commit, rather than per-file.
> If that
>level of granularity is problematic, just splitting the metadata
>into 5 groups would help:
>
> group contents size *
>
> infrastructure all files directly in /usr/src; and 66 MB
> subdirs etc, include, lib, libexec,
> release, rescue, share, tools.
>
> contrib /usr/src/contrib 232 MB
>
> crypto /usr/src/{crypto,kerberos5,secure} 40 MB
>
> kernel /usr/src/sys 143 MB
>
> other /usr/src/{bin,cddl,games,gnu, 50 MB
> sbin,usr.bin,usr.sbin}
I don't believe this is practical given the way FreeBSD and SVN
work. From the SVN perspective, it's not practical to disentagle
the content in that way. From a FreeBSD perspective, I don't think
it'll work - you can't do much without "infrastructure". "contrib"
is referenced from "infrastructure" and "other". "crypto" includes
some historic (but not current) references to "contrib".
>For that matter, FreeBSD could provide the VCS metadata corresponding
>to each release as a separate ISO, so those who need it can obtain
>and install it. Those for whom large downloads are a problem could
>buy it on CD.
Once upon a time, the release CDs did include the CVS tree but it
simply became too big. And, since you can checkout any point in
history I don't believe having a -release repo CD/DVD adds any real
value. You just need a copy of the repo after the relevant release -
this can be downloaded via CTM/ftp or csup for CVS and svn can do it's
own downloading. My guess is that most people for whom large
downloads present a problem know someone who has ready access to the
repo and could burn a CD/DVD for them.
--=20
Peter Jeremy
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