Date: Tue, 11 Nov 2008 19:19:03 +0300 From: Eygene Ryabinkin <rea-fbsd@codelabs.ru> To: Alexey Shuvaev <shuvaev@physik.uni-wuerzburg.de> Cc: freebsd-ports@freebsd.org Subject: Re: ports/128754: [port infrastructure] implement master sites randomization Message-ID: <eug34ZXB3oCwzaFhy76lDCxgwDo@L0uXKD5VodxBs2kecYjbmbfI7F4> In-Reply-To: <20081111153554.GA4294@wep4035.physik.uni-wuerzburg.de> References: <20081110155616.DA66A1AF424@void.codelabs.ru> <20081111032350.0b22a853@gumby.homeunix.com> <20081111153554.GA4294@wep4035.physik.uni-wuerzburg.de>
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Tue, Nov 11, 2008 at 04:35:54PM +0100, Alexey Shuvaev wrote:
> On Tue, Nov 11, 2008 at 03:23:50AM +0000, RW wrote:
> > On Mon, 10 Nov 2008 18:56:16 +0300 (MSK)
> > I think it would be sensible to seed srand from a hash of something
> > reproducible to make better use of caches - maybe DISTNAME+DISTVERSION.
> >
> Maybe I don't understand something, but is RANDOMIZE_MASTER_SITES
> (see bsd.port.mk for details) not enough? It affects though all
> sites, not only SF.
It is enough, but it requires /usr/games/random to be present. Not all
servers have 'games' distribution installed, but I want them to
randomize master sites.
For the feeding the hashes: RW, do you mean HTTP caches? In principle,
this is a neat idea: it will achieve load-balancing between the sites.
But as it will use the same master sites order for the given port, this
will be failing when the first download site is almost down: the
download will take very long. But probably stable order of the sites
can be made settable via the variable, e.g.
RANDOMIZE_MASTER_SITE_REPRODUCIBLY. Will it be fine? Please, note that
this can be achievable only for the awk script: random(6) can not be
currently directed to do this.
--=20
Eygene
_ ___ _.--. #
\`.|\..----...-'` `-._.-'_.-'` # Remember that it is hard
/ ' ` , __.--' # to read the on-line manual =20
)/' _/ \ `-_, / # while single-stepping the kernel.
`-'" `"\_ ,_.-;_.-\_ ', fsc/as #
_.-'_./ {_.' ; / # -- FreeBSD Developers handbook=20
{_.-``-' {_/ #
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