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docs: deprecate the --workaround-btrfs-send option

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Emphasize that the option is relevant to old kernels, older than the
minimum supportable version threshold.

De-emphasize the use case of "send-workaround" as a synonym for "exclude
read-only".

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell 2025-01-11 02:12:28 -05:00
parent e2587cae9b
commit a5d078d48b
1 changed files with 10 additions and 7 deletions
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17
docs/options.md
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@ -84,19 +84,22 @@
* `--workaround-btrfs-send` or `-a`
_This option is obsolete and should not be used any more._
Pretend that read-only snapshots are empty and silently discard any
request to dedupe files referenced through them. This is a workaround for
[problems with the kernel implementation of `btrfs send` and `btrfs send
request to dedupe files referenced through them. This is a workaround
for [problems with old kernels running `btrfs send` and `btrfs send
-p`](btrfs-kernel.md) which make these btrfs features unusable with bees.
This option should be used to avoid breaking `btrfs send` on the same
filesystem.
This option was used to avoid breaking `btrfs send` on old kernels.
The affected kernels are now too old to be recommended for use with bees.
bees now waits for `btrfs send` to finish. There is no need for an
option to enable this.
**Note:** There is a _significant_ space tradeoff when using this option:
it is likely no space will be recovered--and possibly significant extra
space used--until the read-only snapshots are deleted. On the other
hand, if snapshots are rotated frequently then bees will spend less time
scanning them.
space used--until the read-only snapshots are deleted.
## Logging options