mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-15 18:56:16 +02:00
eb7d7780b1
This is needed to avoid this https://github.com/mesonbuild/meson/issues/13774 when we go back to making our subproject directory `src`.
41 lines
1.2 KiB
Markdown
41 lines
1.2 KiB
Markdown
# Name
|
|
|
|
`nix-store --optimise` - reduce disk space usage
|
|
|
|
## Synopsis
|
|
|
|
`nix-store` `--optimise`
|
|
|
|
## Description
|
|
|
|
The operation `--optimise` reduces Nix store disk space usage by finding
|
|
identical files in the store and hard-linking them to each other. It
|
|
typically reduces the size of the store by something like 25-35%. Only
|
|
regular files and symlinks are hard-linked in this manner. Files are
|
|
considered identical when they have the same [Nix Archive (NAR)][Nix Archive] serialisation:
|
|
that is, regular files must have the same contents and permission
|
|
(executable or non-executable), and symlinks must have the same
|
|
contents.
|
|
|
|
After completion, or when the command is interrupted, a report on the
|
|
achieved savings is printed on standard error.
|
|
|
|
Use `-vv` or `-vvv` to get some progress indication.
|
|
|
|
{{#include ./opt-common.md}}
|
|
|
|
{{#include ../opt-common.md}}
|
|
|
|
{{#include ../env-common.md}}
|
|
|
|
## Example
|
|
|
|
```console
|
|
$ nix-store --optimise
|
|
hashing files in `/nix/store/qhqx7l2f1kmwihc9bnxs7rc159hsxnf3-gcc-4.1.1'
|
|
...
|
|
541838819 bytes (516.74 MiB) freed by hard-linking 54143 files;
|
|
there are 114486 files with equal contents out of 215894 files in total
|
|
```
|
|
|
|
[Nix Archive]: @docroot@/store/file-system-object/content-address.md#serial-nix-archive
|