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Re: Instant Mirror Status...?



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 redhat com>
Red Hat

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