Date: Sat, 02 Nov 2013 20:51:47 +0100 From: Matthias Andree <matthias.andree@gmx.de> To: Matthew Seaman <matthew@FreeBSD.org>, freebsd-current@freebsd.org Subject: Re: Official FreeBSD Binary Packages now available for pkgng Message-ID: <527557D3.2040404@gmx.de> In-Reply-To: <5274D90D.8040508@FreeBSD.org> References: <5271BC11.1010303@FreeBSD.org> <CACeEFf4Hif3WHufC=i08gbkXb6oC=4sxbyvO4FQnTkRWA7ZwnA@mail.gmail.com> <5272D0DE.4080209@FreeBSD.org> <CACeEFf79RZskefh6RzBhxkHuAWnGjPWRDr_JBTRUWcGH4ZNVTg@mail.gmail.com> <CAOjFWZ7BbdXYi3gQtTvCa3jqTmjOC-tt5bwV1GR8Jf=tOanT%2BQ@mail.gmail.com> <52745B7F.2080608@vangyzen.net> <5274B947.7030607@FreeBSD.org> <1680682c-dc77-4ee3-8e59-ee7356f307a3@email.android.com> <5274D90D.8040508@FreeBSD.org>
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Am 02.11.2013 11:50, schrieb Matthew Seaman: > On 02/11/2013 10:15, Matthias Andree wrote: >> I understand from Eric's pist that the issue is that through his >> limiting proxies, the SRV are not available at all so he does not even >> get to the point where he could get the pkgN.nyi.freebsd.org >> <http://pkgN.nyi.freebsd.org>; name back. > > That doesn't make sense. All the DNS SRV lookups on pkg.freebsd.org are > done internally to pkg(8), which then issues an HTTP GET to the specific > mirror selected by its internal algorithms. The web cache won't see > literal 'pkg.freebsd.org' anywhere in the HTTP traffic -- as far as it > is concerned, it's a simple HTTP request to a specific mirror > 'pkg1.nyi.freebsd.org', and can be cached using the usual processes. > > What makes it cache unfriendly is that as far as the web cache is > concerned each of the different mirrors appears to be completely > independent of the others. So at the moment the chance of getting a > cache hit is reduced by a factor of three because of the traffic > distribution across the three mirrors. I think it does make sense - if the end user is behind a site where he must use a proxy because his end user's computer does not resolve any external addresses, then SRV is not getting you anywhere and you need a HTTP(S)-based redirector.
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