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[bug#45006] cuirass: Add remote build support.
From: |
zimoun |
Subject: |
[bug#45006] cuirass: Add remote build support. |
Date: |
Mon, 21 Dec 2020 17:41:21 +0100 |
Hi Mathieu,
Thanks for the explanations.
On Mon, 21 Dec 2020 at 16:08, Mathieu Othacehe <othacehe@gnu.org> wrote:
>> Where are these specification_priority and package_priority configured?
>
> specification_priority comes from the new "#:priority" field in the
> Cuirass specification file and package_priority comes from the new
> "#:priority" field in the job structure.
>
> specification_priority ∈ [0, 9]
> package_priority ∈ [0, 9]
>
> ⇒ build_priority ∈ [0, 99]
>
> where 0 is the maximal priority. When both specification_priority and
> package_priority are unset, the priority defaults to 99.
>
> I'm currently using the following priorities:
>
> modular: 1
> guix-master:2
> staging:3
> core-updates:4
Is this the specification_priority?
Where would the package_priority be defined? A file mapping the package
name to the priority number? Something else?
> The builds are picked according to their priority and then their
> timestamp, so that the most recent builds are picked first when the
> priorities are identical.
First are high priority, whatever the timestamp is, right?
> I don't have a strategy regarding package_priority yet.
Why do you need a package_priority strategy? You only need a #:priority
strategy and a formula to compute it with the relevant parameters, here
specification_priority and package_priority. Or I miss something.
In my understanding, the priority is given by something as:
#:priority = f(specification_priority, package_priority, timestamp)
where, for example, once a week the queue is reevaluated to increase the
old; otherwise some could be blocked.
>> This removes part of issues about GC on The Big Store, right?
>
> Yes, this should allow to garbage collect way more aggressively the
> store on berlin and hopefully reduce the GC duration.
Really cool!
Cheers,
simon