GNU bug report logs - #33124
Cuirass: register GC roots for evaluations under /var/guix/gcroots

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Clément Lassieur <clement <at> lassieur.org>
To: bug-guix <at> gnu.org
Subject: Cuirass: register GC roots for evaluations under /var/guix/gcroots
Date: Tue, 23 Oct 2018 11:27:30 +0200

I think the goal here is to make sure that the builds that resulted from
of 1) important evaluations (releases) and 2) recent evaluations aren't
garbage collected.

--8<---------------cut here---------------start------------->8---
<sneek> snape, civodul says: i think Cuirass should register GC roots for its
	evaluations under /var/guix/gcroots
<snape> [...] How many such evaluations should be registered?  If all
	are registered, we'll run out of space won't we?  So would it be
	like the last 15 or something?
<civodul> snape: i think we'd register all of them and use (guix cache) to
	  automatically wipe old ones periodically  [09:53]
<civodul> snape: when there's a release we could manually stash important
	  evaluations away so they won't be deleted
<civodul> so i'd just create one subdir for each eval say in
	  /var/guix/profiles/USER/cuirass/evaluations  [09:54]
<civodul> and that'd contain a bunch of symlinks to both the .drv and the
	  outputs
--8<---------------cut here---------------end--------------->8---

Clément

Message #12 received at 33124-done <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Clément Lassieur <clement <at> lassieur.org>
Cc: 33124-done <at> debbugs.gnu.org
Subject: Re: bug#33124: Cuirass: register GC roots for evaluations under
 /var/guix/gcroots
Date: Wed, 07 Nov 2018 15:29:38 +0100

Hi Clément,

Clément Lassieur <clement <at> lassieur.org> skribis:

> I think the goal here is to make sure that the builds that resulted from
> of 1) important evaluations (releases) and 2) recent evaluations aren't
> garbage collected.
>
> <sneek> snape, civodul says: i think Cuirass should register GC roots for its
> 	evaluations under /var/guix/gcroots
> <snape> [...] How many such evaluations should be registered?  If all
> 	are registered, we'll run out of space won't we?  So would it be
> 	like the last 15 or something?
> <civodul> snape: i think we'd register all of them and use (guix cache) to
> 	  automatically wipe old ones periodically  [09:53]
> <civodul> snape: when there's a release we could manually stash important
> 	  evaluations away so they won't be deleted
> <civodul> so i'd just create one subdir for each eval say in
> 	  /var/guix/profiles/USER/cuirass/evaluations  [09:54]
> <civodul> and that'd contain a bunch of symlinks to both the .drv and the
> 	  outputs

I went ahead and implemented a simple version of this in commit
d4623d50edac4a6e81f5986a91c2818f5fc4965d.

Let me know what you think!

Ludo’.

Message #15 received at 33124-done <at> debbugs.gnu.org (full text, mbox):

From: Clément Lassieur <clement <at> lassieur.org>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 33124-done <at> debbugs.gnu.org
Subject: Re: bug#33124: Cuirass: register GC roots for evaluations under
 /var/guix/gcroots
Date: Wed, 07 Nov 2018 20:24:31 +0100

Ludovic Courtès <ludo <at> gnu.org> writes:

> Hi Clément,
>
> Clément Lassieur <clement <at> lassieur.org> skribis:
>
>> I think the goal here is to make sure that the builds that resulted from
>> of 1) important evaluations (releases) and 2) recent evaluations aren't
>> garbage collected.
>>
>> <sneek> snape, civodul says: i think Cuirass should register GC roots for its
>> 	evaluations under /var/guix/gcroots
>> <snape> [...] How many such evaluations should be registered?  If all
>> 	are registered, we'll run out of space won't we?  So would it be
>> 	like the last 15 or something?
>> <civodul> snape: i think we'd register all of them and use (guix cache) to
>> 	  automatically wipe old ones periodically  [09:53]
>> <civodul> snape: when there's a release we could manually stash important
>> 	  evaluations away so they won't be deleted
>> <civodul> so i'd just create one subdir for each eval say in
>> 	  /var/guix/profiles/USER/cuirass/evaluations  [09:54]
>> <civodul> and that'd contain a bunch of symlinks to both the .drv and the
>> 	  outputs
>
> I went ahead and implemented a simple version of this in commit
> d4623d50edac4a6e81f5986a91c2818f5fc4965d.
>
> Let me know what you think!

This is great.  Thank you very much!

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