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by yjftsjthsd-h 619 days ago
I am stuck in the btrfs-is-buggy mindset precisely because it managed to lose my root partition on a single disk machine. It might also have raid problems, but not exclusively.
1 comments
lproven 618 days ago
Me too. Repeatedly, at least once a year, on 3 different machines.

The cause? Filling up the filesystem. Why? Because of OS snapshots.

(Aside: why can they fill it? Because it doesn't give a straight answer to `df -h`. Why not? Because of snapshots.)

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homebrewer 618 days ago
That happened recently? A few years ago they added a reserved area used for emergency purposes that should solve situations like that. Can't say I've run into these problems, although I don't tend to run btrfs very heavily because performance becomes unacceptable long before that due to CoW.

https://btrfs.readthedocs.io/en/latest/btrfs-filesystem.html

(Look for "GlobalReserve")

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lproven 615 days ago
> That happened recently?

It happened to me repeatedly on both openSUSE Leap and openSUSE Tumbleweed during the 4 years I worked for SUSE: 2017-2021.

The `df` command doesn't work: it does not give reliable info. That alone disqualifies this FS for me.

The `fsck` equivalent does not work: every time I have tried, it corrupts volumes into unreadability.

Those 2 things are hard requirements for me.

I raised this internally as significant issues. They were dismissed.

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