[snvzz]

Writeback latency spikes and lack of data checksums is the main issue with ext4 and xfs.

Btrfs has the checksums, but is a toy.

To my knowledge, NILFS2 (by NTT) is still the best filesystem Linux has in mainline. And, ironically, practically nobody does use it.

[yjftsjthsd-h]

Does NILFS2 ensure data integrity? [0] claims that it doesn't actually check data checksums, but that's from 2011...

[0] https://www.spinics.net/lists/linux-nilfs/msg01063.html

[nix23]

Yes it does:

https://en.wikipedia.org/wiki/NILFS#Additional_features