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Re: deb.debian.org [was: Re: howto avoid "apt-get update" going guru?]

On Fri, Jul 08, 2016 at 08:56:37AM +0200, Adam Borowski wrote:
> On Thu, Jul 07, 2016 at 11:03:16PM -0700, Josh Triplett wrote:
> > Tollef Fog Heen wrote:
> > > ]] Josh Triplett
> > > > Tollef Fog Heen wrote:
> > > > > I personally recommend using deb.debian.org.
> > > > 
> > > > That works nicely, thanks!  Seems to have decent performance.
> > 
> > Ah, that makes sense.  I look forward to the announcement.
> > 
> > When you make the announcement, can you include a link to the details of
> > the CDN, such as the extent of its caching servers?  That would help
> > people determine if using it will likely produce good results for them.
> The locality of this CDN seems to be... not the best.
> In Poland, there's 11 mirrors (according to choose-mirror 2.69), and
> httpredir.debian.net always gives me one of those.  Not the closest one
> network- or geography- wise, but in a country the size of Poland, that's
> good enough.
> deb.debian.org on the other hand, trying from two locations over three ISPs:
> Starogard Gdański/Netia, Starogard Gdański/UPC, Gdańsk/Limes:
> * IPv6: Amsterdam or London
> * IPv4: MIT, San Francisco, London

Just to confirm, did you use SRV records for this check as apt does, or
did you check the path to deb.debian.org's A or AAAA records directly?

If I ping deb.debian.org directly, it resolves to various mirrors,
with ping times ranging from 20ms to 200ms away.  The SRV records,
though, point to a CDN server that reliably gets 20ms.

(I don't actually know the benefit of using SRV records here.)

- Josh Triplett

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