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Btrfs on zoned block devices

Btrfs on zoned block devices

Posted Apr 20, 2021 11:04 UTC (Tue) by kdave (subscriber, #44472)
In reply to: Btrfs on zoned block devices by intelfx
Parent article: Btrfs on zoned block devices

The nocow attribute is sticky and is not a hint. That snapshotting of nocow files write works because first write to a nocow file on the new snapshot will do one time cow, the original file is unaffected.

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Btrfs on zoned block devices

Posted Apr 20, 2021 12:05 UTC (Tue) by intelfx (subscriber, #130118) [Link]

So, technically, `NOCOW` is violated that one time. OK, I assumed this principle expands to the rest of operations in btrfs.


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