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Re: BTRFS snapshot space consumption (was: New laptop: need advice on choice...)




Anders Andersson composed on 2019-04-13 17:31 (UTC+0200):

> Felix Miata wrote:

>> Because of its snapshotting, BTRFS requires considerably more space than older
>> filesystems, as much as double.

> A btrfs snapshot takes approximately zero space. Where did you get
> this idea from? 

(not an exhaustive list)

1: "Disk Space Full Because of Snapper" on https://en.opensuse.org/SDB:BTRFS

2: Since 2015, BTRFS has been the default / filesystem on openSUSE, which
recommends minimum / filesystem size of 20GB for EXT4, compared to 40GB for BTRFS.

3: Much more common / filesystem freespace exhausted threads on mailing lists and
web forums from BTRFS users compared to EXT4 users, with the usual recommendation
to delete one or more snapshots to free space.

4: https://btrfs.wiki.kernel.org/index.php/FAQ#Help.21_I_ran_out_of_disk_space.21

5: https://btrfs.wiki.kernel.org/index.php/FAQ#Why_is_free_space_so_complicated.3F

6:
https://www.linuxquestions.org/questions/linux-containers-122/docker-on-btrfs-using-much-space-in-var-lib-docker-btrfs-4175622037/#post5811463
-- 
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