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Tell me why I shouldn't use btrfs (self.selfhosted)

submitted 8 hours ago by possiblylinux127 to c/[email protected]

44 comments fedilink hide all child comments

About a year ago I switched to ZFS for Proxmox so that I wouldn't be running technology preview.

Btrfs gave me no issues for years and I even replaced a dying disk with no issues. I use raid 1 for my Proxmox machines. Anyway I moved to ZFS and it has been a less that ideal experience. The separate kernel modules mean that I can't downgrade the kernel plus the performance on my hardware is abysmal. I get only like 50-100mb/s vs the several hundred I would get with btrfs.

Any reason I shouldn't go back to btrfs? There seems to be a community fear of btrfs eating data or having unexplainable errors. That is sad to hear as btrfs has had lots of time to mature in the last 8 years. I would never have considered it 5-6 years ago but now it seems like a solid choice.

Anyone else pondering or using btrfs? It seems like a solid choice.

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[–] [email protected] 3 points 7 hours ago (1 children)

I've been vaguely planning on using btrfs in raid5 for my next storage upgrade. Is it really so bad?

[–] [email protected] 6 points 5 hours ago

Check status here. It looks like it may be a little better than the past, but I'm not sure I'd trust it.

An alternative approach I use is mergerfs + snapraid + snapraid-btrfs. This isn't the best idea for a system drive, but if it's something like a NAS it works well and snapraid-btrfs doesn't have the write hole issues that normal snapraid does since it operates on r/o snapshots instead of raw data.