

Did you read the Wiki? You need to either pass the compress_extension option when mounting it. The Arch Wiki lists how to enable compression on all text files. And I gave you the version with a ‘*’, which enables compression for all files. Or you do a chattr -R +c ... on specific files or directories to compress them. Maybe you missed that and that’s why it doesn’t compress?!
There’s probably also a way to debug it and somehow figure out what it does and how many files/sectors got compressed on the filesystem. Linux usually buries that kind of information somewhere in /sys or /proc, or there’s special commands to figure it out. But I’m not really an expert on it.
And there’s also files which just can not be compressed any further because they’re already compressed. Most images, for example. Or music or ZIP archives. If you try to compress those, they’ll usually stay the same size.




Sounds reasonable. Yeah, good luck. I’m sure you’ll figure it out. Unfortunately it’s always a bit difficult to diagnose problems over the internet, without typing in the commands and seeing the exact output. But there should be a way to make it work, F2FS is designed for something like this.