BTRFS support per-subvolume compression, isn't it?

BTRFS support per-subvolume compression, isn't it?

[Eugene Bright]

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Greetings!

BTRFS wiki says there is no per-subvolume compression option [1].

At the same time next command allow me to set properties per-subvolume:
        btrfs property set /volume compression zstd

Corresponding get command shows distinct properties for every subvolume.
Should wiki be updated?

-- 
King regards
Eugene Bright
IT engineer

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[1] https://btrfs.wiki.kernel.org/index.php/Compression#Can_I_set_compression_per-subvolume.3F

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Re: BTRFS support per-subvolume compression, isn't it?

[Austin S. Hemmelgarn]

On 2018-08-27 17:05, Eugene Bright wrote:
> Greetings!
> 
> BTRFS wiki says there is no per-subvolume compression option [1].
> 
> At the same time next command allow me to set properties per-subvolume:
>          btrfs property set /volume compression zstd
> 
> Corresponding get command shows distinct properties for every subvolume.
> Should wiki be updated?
> 
The wiki should be updated, but it's not technically wrong.

What the wiki is talking about is per-subvolume mount options to control 
compression (so, mounting individual subvolumes from the same volume 
with different `compress=` or `compress-force=` mount options), which is 
not currently supported.

You are correct though that properties can be used to achieve a similar 
result (compressing differently for different subvolumes.