Finding the Best Block Filesystem for Your Embedded Linux System

on YouTube ↗41m

" summary

Benchmarks compare ext2, ext4, xfs, btrfs, f2fs, squashfs and erofs on 32‑ and 64‑bit ARM using a fast SD card, measuring kernel module size, module load + mount time, read/write microbenchmarks and compressed images. SD card optimal write block is 4K and segment boundary shows ~4MB behavior. ext4 wins as default for balanced boot and writes, f2fs gives best read performance, nilfs2 is fastest at deletes but shows volatile results. Compression helps size (lz4/lzo fastest, zlib best ratio) but usually slows writes on single‑core CPUs.

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" chapters (11)

1. 0:00Start
2. 16:22Raw write tests on 8 SD cards
3. 18:21How to infer the segment size?
4. 22:20Btrfs vs Btrfs
5. 22:54Btrfs ssd options
6. 23:52Btrfs compression options
7. 28:59Kernel module size.
8. 29:10Module loading time
9. 29:41Boot time: module loading and mounting time
10. 30:31Reading time
11. 31:25Writing time

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