On 06-01-26, Eric wrote:
> On Tuesday, January 6th, 2026 at 07:43, Thibaut <[email protected]> wrote:
> > About that. I can give you an excellent reason to run a local mirror when 
> > you depend on packages repositories being available and « working », e.g. 
> > when frequently building lots of images using IB: when the CDN becomes out 
> > of sync (say Packages doesn’t match the actual files available for download 
> > - and it happens quite often), you’re screwed.
> ...
> > I believe it would make more sense to work on having a saner build system 
> > that can (build - that would also save CPU cycles - and) update only 
> > actually modified packages. There’s been preliminary work in phase1 to 
> > address this (at least for the ‘update’ part). Then all forms of mirror 
> > traffic should naturally decrease as untouched bits remain valid in cache.
> 
> Big thumbs up here.  This is such a problem with ASU builds that we've
> got detection mechanisms on the server that look for out-of-sync package 
> issues and then tell users "wait a while and try again"...  I don't know
> how many dozens (hundreds?) of times I've had to explain this on the forums
> over the past couple of years as ASU gains more traction with users.

I believe this is caused by the CDN cache that introduces inconsistencies
between Packages list and actual packages.

I checked and we are actively busting the CDN cache through the Fastly API
when updating data on the download server.  This is done since at least
August 2025 (but I don't know if it works well).

Have you experienced inconsistencies since August?

If this is a different issue, do you have a link with a description of the 
problem in details?

Baptiste

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