Re: Bringing substitutes from the Guix Build Coordinator to users

[Christopher Baines <mail@cbaines.net>]

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Ludovic Courtès <ludo@gnu.org> writes:

> Hi,
>
> Christopher Baines <mail@cbaines.net> skribis:
>
>> If there's effort put in to getting substitutes served from bayfront,
>> why do you suggest not documenting how to get those substitutes in the
>> manual?
>
> Mostly because bayfront is not as powerful as the build farm behind
> ci.guix.

I see that mostly as an argument for trying to bring the benefits of the
Guix Build Coordinator to the substitutes served by ci.guix.gnu.org.

Even with 3 machines for x86_64-linux (2.x given that bayfront is only
lightly used), bayfront has pretty much caught up with ci.guix.gnu.org
in terms of x86_64-linux substitutes, and I expect it to have a higher
substitute availability percentage in the coming days, since it's still
working through the backlog.

Once it is doing better, at least for x86_64-linux substitutes, I see
that as a strong argument to promote it to users (default config change,
blog post, ...).

1:
→ guix describe
Generation 310	May 16 2021 09:06:12	(current)
  guix 7c4c781
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 7c4c781aa40c42d4cd10b8d9482199f3db345e1b

→ guix weather --substitute-urls="https://bayfront.guix.gnu.org https://ci.guix.gnu.org"
computing 17,423 package derivations for x86_64-linux...
looking for 18,872 store items on https://bayfront.guix.gnu.org...
https://bayfront.guix.gnu.org
  91.6% substitutes available (17,293 out of 18,872)
  37,146.8 MiB of nars (compressed)
  143,978.2 MiB on disk (uncompressed)
  (continuous integration information unavailable)
looking for 18,872 store items on https://ci.guix.gnu.org...
https://ci.guix.gnu.org
  92.1% substitutes available (17,389 out of 18,872)
  at least 139,781.5 MiB of nars (compressed)
  35,184,372,238,367.3 MiB on disk (uncompressed)

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