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.Dd May 8, 2021
.Dt ZSTREAM 8
.Os OpenZFS
.
.Sh NAME
.Nm zstream
.Nd manipulate ZFS send streams
.Sh SYNOPSIS
.Nm
.Cm dump
.Op Fl Cvd
.Op Ar file
.Nm
.Cm redup
.Op Fl v
.Ar file
.Nm
.Cm token
.Ar resume_token
.
.Sh DESCRIPTION
The
.Sy zstream
utility manipulates ZFS send streams output by the
.Sy zfs send
command.
.Bl -tag -width ""
.It Xo
.Nm
.Cm dump
.Op Fl Cvd
.Op Ar file
.Xc
Print information about the specified send stream, including headers and
record counts.
The send stream may either be in the specified
.Ar file ,
or provided on standard input.
.Bl -tag -width "-D"
.It Fl C
Suppress the validation of checksums.
.It Fl v
Verbose.
Print metadata for each record.
.It Fl d
Dump data contained in each record.
Implies verbose.
.El
.Pp
The
.Nm zstreamdump
alias is provided for compatibility and is equivalent to running
.Nm
.Cm dump .
.It Xo
.Nm
.Cm token
.Ar resume_token
.Xc
Dumps zfs resume token information
.It Xo
.Nm
.Cm redup
.Op Fl v
.Ar file
.Xc
Deduplicated send streams can be generated by using the
.Nm zfs Cm send Fl D
command.
The ability to send deduplicated send streams is deprecated.
In the future, the ability to receive a deduplicated send stream with
.Nm zfs Cm receive
will be removed.
However, deduplicated send streams can still be received by utilizing
.Nm zstream Cm redup .
.Pp
The
.Nm zstream Cm redup
command is provided a
.Ar file
containing a deduplicated send stream, and outputs an equivalent
non-deduplicated send stream on standard output.
Therefore, a deduplicated send stream can be received by running:
.Dl # Nm zstream Cm redup Pa DEDUP_STREAM_FILE | Nm zfs Cm receive No …
.Bl -tag -width "-D"
.It Fl v
Verbose.
Print summary of converted records.
.El
.El
.
.Sh SEE ALSO
.Xr zfs 8 ,
.Xr zfs-receive 8 ,
.Xr zfs-send 8