Storage optimization: Difference between revisions

Line 59:

As you see, the reference in <code>/run/booted-system</code> is a GC root, so it won't be cleared until reboot. If you don't want to reboot, just <code>rm /run/booted-system</code> that link and rerun <code>sudo nix-collect-garbage</code>.

=== ~~Proper <code>nix-shell</code> GC pinning~~ ===

=== Pinning ===

When you invoke <code>nix-shell</code> with

Line 70:

Obviously, you should remove the GC roots directory for projects you don't plan to work on.

=== ~~Automatic garbage collection~~ ===

=== Automation ===

~~Next you may~~ enable periodic ~~auto~~ GC, for example like this:

It is possible to enable periodic automatic GC,<ref group="cf.">{{nixos:option|nix.gc}}</ref> for example like this:

nix.gc.automatic = true;

nix.gc = {

~~nix.gc.~~dates = "weekly";

automatic = true;

~~nix.gc.~~options = "--delete-older-than 30d";</syntaxhighlight>

dates = "weekly";

This can result ~~into some~~ redownloads (~~if you ever use~~ <code>import (builtins.fetchFromTarball ...)</code> ~~all these fetched tarballs~~ are not referenced anywhere and removed on GC), but ~~overall~~ it frees you from runnning GC manually ~~often~~.

options = "--delete-older-than 30d";

};

</syntaxhighlight>

This can result in redownloads (tarballs fetched with <code>import (builtins.fetchFromTarball ...)</code> for example are not referenced anywhere and removed on GC), but it frees you from runnning GC manually.

== Moving the store ==

@@ Line 59: / Line 59: @@
 As you see, the reference in <code>/run/booted-system</code> is a GC root, so it won't be cleared until reboot. If you don't want to reboot, just <code>rm /run/booted-system</code> that link and rerun <code>sudo nix-collect-garbage</code>.
-=== Proper <code>nix-shell</code> GC pinning ===
+=== Pinning ===
 When you invoke <code>nix-shell</code> with
@@ Line 70: / Line 70: @@
 Obviously, you should remove the GC roots directory for projects you don't plan to work on.
-=== Automatic garbage collection ===
+=== Automation ===
-Next you may enable periodic auto GC, for example like this:
+It is possible to enable periodic automatic GC,<ref group="cf.">{{nixos:option|nix.gc}}</ref> for example like this:
-<syntaxhighlight lang="bash">
+<syntaxhighlight lang="nix">
-nix.gc.automatic = true;
+nix.gc = {
-nix.gc.dates = "weekly";
+  automatic = true;
-nix.gc.options = "--delete-older-than 30d";</syntaxhighlight>
+  dates = "weekly";
-This can result into some redownloads (if you ever use <code>import (builtins.fetchFromTarball ...)</code> all these fetched tarballs are not referenced anywhere and removed on GC), but overall it frees you from runnning GC manually often.
+  options = "--delete-older-than 30d";
+};
+</syntaxhighlight>
+This can result in redownloads (tarballs fetched with <code>import (builtins.fetchFromTarball ...)</code> for example are not referenced anywhere and removed on GC), but it frees you from runnning GC manually.
 == Moving the store ==