Re: /gnu/store/.links/

[Pjotr Prins]

On Fri, Feb 09, 2018 at 06:00:02PM +0100, Ludovic Courtès wrote:
> In practice, when the maximum number of links is reached, we simply
> transparently skip deduplication.  See this commit:
> 
>   commit 12b6c951cf5ca6055a22a2eec85665353f5510e5
>   Author: Ludovic Courtès <address@hidden>
>   Date:   Fri Oct 28 20:34:15 2016 +0200
> 
>       daemon: Do not error out when deduplication fails due to ENOSPC.
> 
>       This solves a problem whereby if /gnu/store/.links had enough entries,
>       ext4's directory index would be full, leading to link(2) returning
>       ENOSPC.
> 
>       * nix/libstore/optimise-store.cc (LocalStore::optimisePath_): Upon
>       ENOSPC from link(2), print a message and return instead of throwing a
>       'SysError'.
> 
> It does scale well, and it’s been here “forever”.

OK. My mindset is probably ext2...

> If you’re wondering how much gets deduplicated, see
> <https://lists.gnu.org/archive/html/guix-devel/2014-09/msg00422.html>.
> :-)

Fancy that :)

Pj.