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[storage][file_systems] Btrfs with zstd compression
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zstd compression levels on Btrfs:
- 1 = Slightly slower than lzo but compresses more.
- 2 = The best performance to speed ratio.
- 3 = The default. This was selected by the Btrfs developers because it provides a large compressed size advantage over lzo.
https://www.reddit.com/r/btrfs/comments/bpphbz/my_benchmarks_of_the_new_zstd_levels_in_51/
- 4 or more is not worth using.
https://www.reddit.com/r/zfs/comments/sxx9p7/a_simple_real_world_zfs_compression_speed_an/