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What Are Btrfs Subvolumes? And Why They’re Better Than Traditional Linux Partitions (itsfoss.com)
submitted 7 months ago by to c/linux@programming.dev
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[–] 8 points 7 months ago (2 children)

Ignoring /boot, what is the benefit of putting everything else in different subvolumes? As opposed to just one subvolume for / and one for /home, which is what I currently have. It just looks to me like it’d be extra work, but I’m probably missing something

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  • [–] 15 points 7 months ago

    You can snapshot them independently. E.g. I snapshot / on every update and boot, /home every boot, and temporary file directories such as /tmp & /var/tmp don't get snapshot at all and are also mounted with nodev,nosuid,noexec flags.

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  • [–] 4 points 7 months ago*

    For one thing if you're snapshotting your subvolumes for backup purposes then it will ignore nested subvolumes. Eg you dont want to preserve snapshots of huge installed game directories, cache directories, logs or docker / podman images, usually. Saves a lot of space.

    Also you can tune copy on write on a subvolume, which is great for some use cases for performance.

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