直接备份数据(以防万一)后把文件系统 convert (
https://wiki.archlinux.org/title/Btrfs#Ext3/4_to_Btrfs_conversion )过来就行,再启用 zstd 压缩就好了,一般能压缩的 zstd 压缩结果在 38% 左右,的确很节省空间并延长 SSD 寿命。
我使用的压缩 zstd=3 默认水平,压缩效果分 / 和 /home:
sudo compsize -x /
Processed 514750 files, 311074 regular extents (323117 refs), 295598 inline.
Type Perc Disk Usage Uncompressed Referenced
TOTAL 58% 14G 24G 25G
none 100% 8.0G 8.0G 7.8G
zstd 35% 5.3G 15G 16G
prealloc 100% 818M 818M 1016M
sudo compsize -x /home
Processed 4067717 files, 3248206 regular extents (3374612 refs), 2410852 inline.
Type Perc Disk Usage Uncompressed Referenced
TOTAL 76% 458G 601G 623G
none 100% 386G 386G 396G
zstd 33% 71G 214G 226G
prealloc 100% 37M 37M 144M