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Comment by ffsm8

5 days ago

Technically speaking, bcachefs has been merged into the Linux Kernel - that makes your initial assertion wrong.

But considering it's had two drama events within 1 year of getting merged... I think we can safely confirm your conclusion of it being really hard

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ffsm8

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mustache_kimono  5 days ago

> Technically speaking, bcachefs has been merged into the Linux Kernel - that makes your initial assertion wrong.

bcachefs doesn't implement its erasure coding/RAID yet? Doesn't implement send/receive. Doesn't implement scrub/fsck. See: https://bcachefs.org/Roadmap, https://bcachefs.org/Wishlist/

btrfs is still more of a legit competitor to ZFS these days and it isn't close to touching ZFS where it matters. If the perpetually half-finished bcachefs and btrfs are the "answer" to ZFS that seems like too little, too late to me.

  • koverstreet  5 days ago

    Erasure coding is almost done; all that's missing is some of the device evacuate and reconstruct paths, and people have been testing it and giving positive feedback (especially w.r.t. performance).

    It most definitely does have fsck and has since the beginning, and it's a much more robust and dependable fsck than btrfs's. Scrub isn't quite done - I actually was going to have it ready for this upcoming merge window except for a nasty bout of salmonella :)

    Send/recv is a long ways off, there might be some low level database improvements needed before that lands.

    Short term (next year or two) priorities are finishing off online fsck, more scalability work (upcoming version for this merge window will do 50PB, but now we need to up the limit on number of drives), and quashing bugs.

    • ryao  5 days ago

      Hearing that it is missing some code for reconstruction makes it sound like it is missing something fairly important. The original purpose of parity RAID is to support reconstruction.

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    • BSDobelix  4 days ago

      >except for a nasty bout of salmonella

      Did the Linux Foundation send you some "free" sushi? ;)

      However keep the good work rolling, super happy about a good, usable and modern Filesystem native to Linux.

    • pdimitar  4 days ago

      FYI: the main reason I gave up on bcachefs is that I can't use devices with native 16K blocks.

      Hope that's coming this year. I have a bunch of old HDDs and SSDs and I could very easily assemble a spare storage server with about 4TB capacity. Already tested bcachefs with most of the drives and it performed very well.

      Also lack of ability to reconstruct seems like another worrying omission.

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