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docs: toxic extents and btrfs send

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Update documentation of toxic extent / slow backref workaround.

Add notes about btrfs send kernel bugs and incremental send failures.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell
2018-11-06 00:56:06 -05:00
parent 688d0dc014
commit 19859b0a0d
3 changed files with 27 additions and 28 deletions
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docs/btrfs-other.md
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@@ -31,7 +31,8 @@ bees has been tested in combination with the following, and various problems are
* btrfs send: some kernel versions have bugs in btrfs send that can be
triggered by bees. The send can be restarted and will work if bees
has finished processing the snapshot being sent. No data corruption
observed other than the truncated send.
observed other than the truncated send. Incremental send doesn't seem
to work with bees running on the sending side.
* btrfs qgroups: very slow, sometimes hangs...and it's even worse when
bees is running.
* btrfs autodefrag mount option: hangs and high CPU usage problems