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Bcachefs may be headed out of the kernel

(lwn.net)
144 points ksec | 2 comments | 04 Jul 25 13:32 UTC | HN request time: 0.463s | source
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msgodel ◴[04 Jul 25 17:53 UTC] No.44466535[source]▶
The older I get the more I feel like anything other than the ExtantFS family is just silly.

The filesystem should do files, if you want something more complex do it in userspace. We even have FUSE if you want to use the Filesystem API with your crazy network database thing.

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heavyset_go ◴[04 Jul 25 19:44 UTC] No.44467306[source]▶
Transparent compression, checksumming, copy-on-write, snapshots and virtual subvolumes should be considered the minimum default feature set for new OS installations in TYOOL 2025.

You get that with APFS by default on macOS these days and those features come for free in btrfs, some in XFS, etc on Linux.

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riobard ◴[04 Jul 25 20:40 UTC] No.44467710[source]▶
APFS checksums only fs metadata not user data which is a pita. Presumably because APFS is used on single drive systems and there’s no redundancy to recover from anyway. Still, not ideal.
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vbezhenar ◴[04 Jul 25 20:47 UTC] No.44467765[source]▶
Apple trusts their hardware to do their own checksums properly. Modern SSD uses checksums and parity codes for blocks. SATA/NVMe include checksums for protocol frames. The only unreliable component is RAM, but FS checksums can't help here, because RAM bit likely will be flipped before checksum is calculated or after checksum is verified.
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1. riobard ◴[04 Jul 25 21:32 UTC] No.44468024[source]▶
If they do trust their hardware, APFS won’t need to checksum fs metadata either, so I guess they don’t trust it well enough? Also I have external drives that is not Apple sanctioned to store files and I don’t trust them enough either, and there’s no choice of user data checksumming at all.
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2. 1over137 ◴[05 Jul 25 04:24 UTC] No.44470056[source]▶
Apple does not care about your external non-Apple drives. In the slightest.