←back to thread

Bcachefs Goes to "Externally Maintained"

(lwn.net)
215 points ksec | 1 comments | 30 Aug 25 13:07 UTC | HN request time: 0.213s | source
Show context
LeoPanthera ◴[30 Aug 25 17:28 UTC] No.45076431[source]▶
It's orphaned in Debian as well, but I'm not sure what significant advantages it has over btrfs, which is very stable these days.
replies(1): >>45076586 #
betaby ◴[30 Aug 25 17:47 UTC] No.45076586[source]▶
btrfs was unusable in multi disk setup for kernels 6.1 and older. Didn't try since then. How's stable btrs today in such setups?

Also see https://www.phoronix.com/news/Josef-Bacik-Leaves-Meta

replies(5): >>45076637 #>>45076834 #>>45076978 #>>45076998 #>>45081574 #
LeoPanthera ◴[30 Aug 25 17:52 UTC] No.45076637[source]▶
It's sort of frustrating that this constantly comes up. It's true that btrfs does have issues with RAID-5 and RAID-6 configurations, but this is frequently used (not necessarily by you) as some kind of gotcha as to why you shouldn't use it at all. That's insane. I promise that disk spanning issues won't affect your use of it on your tiny ThinkPad SSD.

It's important to note that striping and mirroring works just fine. It's only the 5/6 modes that are unstable: https://btrfs.readthedocs.io/en/stable/Status.html#block-gro...

replies(5): >>45076707 #>>45076727 #>>45076740 #>>45076809 #>>45077208 #
risho ◴[30 Aug 25 19:14 UTC] No.45077208[source]▶
as it turns out raid 5 and 6 being broken is kind of a big deal for people. its also far from ideal that the filesystem has random landmines that you can accidentally step on if you don't happen to read hacker news every day.
replies(1): >>45082379 #
1. jorams ◴[31 Aug 25 11:33 UTC] No.45082379[source]▶
FWIW: RAID 5 and 6 having problems is not a random hole you'll accidentally stumble into.

The man page for mkfs.btrfs says:

> Warning: RAID5/6 has known problems and should not be used in production.

When you actually tell it to use raid5 or raid6, mkfs.btrfs will also print a large warning:

> WARNING: RAID5/6 support has known problems is strongly discouraged to be used besides testing or evaluation.