Btrfs updates for 6.7 with new raid-stripe-tree

lore.kernel.org

The raid-stripe-tree is exciting for multiple reasons.

For one, it finally solves the raid56 write-hole similar to how zfs does, by never updating the stripe in-place.

And it is developed by Western Digital for use in zoned storage (host managed SMR), so there is a commercial user of btrfs raid now. This was missing before and was the reason btrfs raid didn't go anywhere for so long.

I thought Synology has used BTRFS on their higher end NAS devices.

Yes but they don't contribute upstream. They run a old kernel with an enormous out of tree patchset on top to combine dm-raid with btrfs.

Too little to late unfortunately. Many have written btrfs off as a loss and are looking at alternatives. bcachefs is hopefully going to be the next step for file systems on Linux.

Considering how long file systems bake before seeing wide adoption, I'm curious if bcachefs has enough of an edge to gain popularity and widespread support. It's features look impressive.

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