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[bug#51427] [PATCH] nix: libstore: Do not remove unused links when delet

From: Ludovic Courtès
Subject: [bug#51427] [PATCH] nix: libstore: Do not remove unused links when deleting specific items.
Date: Tue, 09 Nov 2021 13:56:35 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux)


Jack Hill <> skribis:

> On Mon, 8 Nov 2021, Maxim Cournoyer wrote:
>> Ludovic Courtès <> writes:
>>> BTW, those using Btrfs can probably use ‘--disable-deduplication’ and be
>>> done with it.
>> I erroneously used to think that Btrfs could do live deduplication, but
>> it doesn't.  There are external tools to do out of band / batch
>> deduplication though [0]; so if they perform better than the guix daemon's
>> own dedup, perhaps we could document this way out for our Btrfs users.
>> [0]
> A little while ago I had hoped to test btrfs with
> --disable-deduplication and bees [1] as the deduplication agent, but
> wasn't able to successfully run a system with --disable-deduplication
> because I needed the deduplication to cover up problem with grafts
> [2]. Until we resolve the second issue, I don't think we should
> recommend folks run the daemon with --disable-deduplication.
> [1] (still missing a service)
> [2]

Oh, right.  We didn’t quite get to the bottom of #2.  Is it still an
issue?  Some questions remained opened.


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