Btrfs supports the "no dump" file attribute and it is preserved when taking snapshots. But after sending such a snapshot to another Btrfs using btrfs send and btrfs receive, all values of the "no dump" attribute are lost. By contrast the "compress data" attribute values are preserved through that procedure. Why?
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Dzamo Norton
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The helpful folk at #btrfs pointed out to me that the answer is up on the web. That answer is that, as of the time of writing, it's a work in progress.
https://btrfs.wiki.kernel.org/index.php/Design_notes_on_Send/Receive#Send_stream_v2_draft
Dzamo Norton
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