GNU bug report logs - #51427
[PATCH] nix: libstore: Do not remove unused links when deleting specific items.

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Message #53 received at 51427 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Liliana Marie Prikler <liliana.prikler <at> gmail.com>
Cc: 51427 <at> debbugs.gnu.org, Maxim Cournoyer <maxim.cournoyer <at> gmail.com>,
 zimoun <zimon.toutoune <at> gmail.com>
Subject: Re: bug#51427: [PATCH] nix: libstore: Do not remove unused links
 when deleting specific items.
Date: Tue, 19 Jul 2022 10:34:33 +0200

Hi,

Liliana Marie Prikler <liliana.prikler <at> gmail.com> skribis:

> Am Montag, dem 18.07.2022 um 15:57 +0200 schrieb Ludovic Courtès:
>> Hello,
>> 
>> With commit 472a0e82a52a3d5d841e1dfad6b13e26082a5750 (Nov. 2021),
>> partially fixing <https://issues.guix.gnu.org/24937>, there is
>> hopefully less pressure to skip the remove-unused-links phase.
>> 
>> Should we close this issue?
> As a hard disk user, I'm leaning towards "no".

At the REPL, could you do:

  ,use(ice-9 ftw)
  ,t (length (scandir "/gnu/store/.links"))

?

On my SSD I get:

  $4 = 438356
  ;; 24.613712s real time, 10.195698s run time.  1.805636s spent in GC.

This ‘scandir’ call is a good approximation of the cost of the
remove-unused-links phase.

Ludo’.

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