diff options
| author | Matthew Ahrens <[email protected]> | 2020-04-23 10:06:57 -0700 |
|---|---|---|
| committer | GitHub <[email protected]> | 2020-04-23 10:06:57 -0700 |
| commit | 196bee4cfd576fb15baa6a64ad6501c594f45497 (patch) | |
| tree | b0a30594c38416a426e691544beecd7731feb742 /man/man8/zfs-send.8 | |
| parent | 70e5ad31f6425868b8a173bbc2be4ef08a8d949b (diff) | |
Remove deduplicated send/receive code
Deduplicated send streams (i.e. `zfs send -D` and `zfs receive` of such
streams) are deprecated. Deduplicated send streams can be received by
first converting them to non-deduplicated with the `zstream redup`
command.
This commit removes the code for sending and receiving deduplicated send
streams. `zfs send -D` will now print a warning, ignore the `-D` flag,
and generate a regular (non-deduplicated) send stream. `zfs receive` of
a deduplicated send stream will print an error message and fail.
The resulting code simplification (especially in the kernel's support
for receiving dedup streams) should help enable future performance
enhancements.
Several new tests are added which leverage `zstream redup`.
Reviewed-by: Paul Dagnelie <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Matthew Ahrens <[email protected]>
Issue #7887
Issue #10117
Issue #10156
Closes #10212
Diffstat (limited to 'man/man8/zfs-send.8')
| -rw-r--r-- | man/man8/zfs-send.8 | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/man/man8/zfs-send.8 b/man/man8/zfs-send.8 index 1deedc214..c1b2134d1 100644 --- a/man/man8/zfs-send.8 +++ b/man/man8/zfs-send.8 @@ -86,21 +86,9 @@ The output can be redirected to a file or to a different system By default, a full stream is generated. .Bl -tag -width "-D" .It Fl D, -dedup -Generate a deduplicated stream. -\fBDeduplicated send is deprecated and will be removed in a future release.\fR -(In the future, the flag will be accepted but a regular, non-deduplicated -stream will be generated.) -Blocks which would have been sent multiple times in the send stream will only be -sent once. -The receiving system must also support this feature to receive a deduplicated -stream. -This flag can be used regardless of the dataset's -.Sy dedup -property, but performance will be much better if the filesystem uses a -dedup-capable checksum -.Po for example, -.Sy sha256 -.Pc . +Deduplicated send is no longer supported. +This flag is accepted for backwards compatibility, but a regular, +non-deduplicated stream will be generated. .It Fl I Ar snapshot Generate a stream package that sends all intermediary snapshots from the first snapshot to the second snapshot. |