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Bcachefs Might Be Ready For Upstreaming In Linux This Year

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  • flower
    replied
    Originally posted by vladpetric View Post

    BTRFS' RAID5/6 are fundamentally broken - much like the RBMK nuclear reactor of Chernobyl (and several other meltdowns).

    While bcachefs doesn't have RAID5/6 either, Kent seems to be doing a better job with filesystem design in general, even though he lacks the man power at this time.
    It has erasure encoding. Which is basically the same as raid56.

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  • pkese
    replied
    Originally posted by vladpetric View Post

    BTRFS' RAID5/6 are fundamentally broken - much like the RBMK nuclear reactor of Chernobyl (and several other meltdowns).

    While bcachefs doesn't have RAID5/6 either, Kent seems to be doing a better job with filesystem design in general, even though he lacks the man power at this time.
    It's not that RAID5/6 "ON btrfs" fundamentally broken ... it's just not high enough on priority lists.
    But otherwise yes, RAID5/6 is fundamentally broken ...

    No datacenter with serious amount of data is going to be using RAID5/6 anyway, because with larger disk sizes, it is becoming increasingly likely, that a RAID5 array does not survive a rebuild anyway. Cloud providers and backupers (Backblaze) have built their own distrubuted file systems.

    I don't think implementing RAID5/6 for btrfs is even worth the effort. People are free to use md-raid and ZFS while the RAID5/6 concept still lasts.
    There's no real market for RAID5 anyway ... except Linux nerds in their garages, who would then blame it on btrfs, when their RAID arrays wouldn't rebuild, even if it was due to real errors on their crappy 10-year old SATA drives bought garage sale.

    No, it's not worth it. There's plenty of other useful features that are worth more effort than RAID5.

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  • Sin2x
    replied
    Reiser5 is better.

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  • vladpetric
    replied
    Originally posted by piorunz View Post
    Bcachefs - a new Btrfs?
    BTRFS' RAID5/6 are fundamentally broken - much like the RBMK nuclear reactor of Chernobyl (and several other meltdowns).

    While bcachefs doesn't have RAID5/6 either, Kent seems to be doing a better job with filesystem design in general, even though he lacks the man power at this time.

    Leave a comment:


  • Quackdoc
    replied
    I run a lot of stuff in VM's if this get's mainlined I could see me testing it. looks pretty cool

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  • pal666
    replied
    Originally posted by piorunz View Post
    Bcachefs - a new Btrfs?
    it seems to be close to btrfs's state in 2008

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  • lyamc
    replied
    I've been using bcachefs since around 2018. The only problems I've run into were either fixed that day, or were caused by me not upgrading the filesystem versions properly. If anyone wants some quick and dirty tests I think I can find an SSD lying around.

    IMO the biggest missing feature right now is scrubbing: https://bcachefs.org/bcachefs-princi...-operation.pdf
    image_1866.png
    Last edited by lyamc; 16 February 2022, 06:22 PM.

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  • Charlie68
    replied
    It is spoken of as a ready-to-use file system, it is not, and it is unknown when it will be. I have always been away from new file systems, because there are always so many expectations, but also so many headaches and breakdowns .... if it is true that he has only one developer, I will try him in five years to be optimistic.

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  • Steffo
    replied
    Would be really intersted in performance benchmarks.

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  • cl333r
    replied
    Forget bcachefs, what's up with BUS1?

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