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docs(iso): Use either an env options file or shell exports (#6)

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hygienic-books 2023-11-04 00:01:29 +01:00
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@ -99,6 +99,14 @@ The script will create a single ZFS zpool `zpool` on the zpool partition with da
## Options ## Options
The following options can be given either by exporting them as shell variables prior to script execution or in a file named `archzbm_settings.env` that lives in your current working directory where you're about to execute the script. File format is identical to shell variable assignments of the form `VAR=value` or `VAR='value'`.
If `./archzbm_settings.env` exists the script will `source` its content and `export` all variables for use in future steps.
In cases where a variable is both exported prior to script execution and specified in `archzbm_settings.env` the latter will override the former.
Known options are as follows.
### Compression ### Compression
By default we create a zpool with ZFS property `compression=on`. If the `lz4_compress` pool feature is active this will by default enable `compression=lz4`. See `man 7 zfsprops` for example in ZFS 2.1.9 for details. See `zpool get feature@lz4_compress <pool>` to check this feature's status on your `<pool>`. By default we create a zpool with ZFS property `compression=on`. If the `lz4_compress` pool feature is active this will by default enable `compression=lz4`. See `man 7 zfsprops` for example in ZFS 2.1.9 for details. See `zpool get feature@lz4_compress <pool>` to check this feature's status on your `<pool>`.