Instant Mirror Status...?
James Antill
james.antill at redhat.com
Wed Sep 24 14:10:20 UTC 2008
On Tue, 2008-09-23 at 13:41 -0500, Les Mikesell wrote:
> Emmanuel Seyman wrote:
> > * Gregory Maxwell [22/09/2008 20:04] :
> >> How would it know?
> >
> > And more importantly, if you want to always hit the same mirror, why don't
> > you edit its configuration to reflect that ?
>
> Here's the scenario: you have hundreds/thousands of people behind a
> caching proxy. They don't know each other, they don't know what OS
> distribution someone else is installing and the ones that happen to be
> installing Fedora aren't going to know what mirror someone else chose or
> got by accident. Likewise for the proxy - it's not going to know/care
> that there are a bunch of different mirrors for different stuff that an
> assortment of people might or might not want at the same time.
Outcomes:
1) Noone does anything and the ISP/company serving the people download
packages/etc. lots of times eating the company/ISPs bandwidth.
2) ISP/company tells MirrorManager what is going on, and saves bandwidth
(note they get to solve their own problem, yay).
And here's another scenario: hundreds/thousands of people with "close"
IPs which aren't behind the same proxy, MirrorManager gives them the
same list in the same order to try and hack around #1 above. Now
everyone's download goes slow as they all hit the same mirror server
(and the mirror server admin wonders why he got screwed over). Everyone
complains and says MirrorManager/yum sucks ... and there's nothing
anyone can do to fix the problem.
--
James Antill <james.antill at redhat.com>
Red Hat
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