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+.\"
+.\" CDDL HEADER START
+.\"
+.\" The contents of this file are subject to the terms of the
+.\" Common Development and Distribution License (the "License").
+.\" You may not use this file except in compliance with the License.
+.\"
+.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+.\" or http://www.opensolaris.org/os/licensing.
+.\" See the License for the specific language governing permissions
+.\" and limitations under the License.
+.\"
+.\" When distributing Covered Code, include this CDDL HEADER in each
+.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+.\" If applicable, add the following below this CDDL HEADER, with the
+.\" fields enclosed by brackets "[]" replaced with your own identifying
+.\" information: Portions Copyright [yyyy] [name of copyright owner]
+.\"
+.\" CDDL HEADER END
+.\"
+.\"
+.\" Copyright (c) 2020 by Delphix. All rights reserved.
+.Dd March 25, 2020
+.Dt ZSTREAM 8
+.Os
+.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
+.sp
+.LP
+The
+.Sy zstream
+utility manipulates zfs send streams, which are the output of 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
+.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:
+.Bd -literal
+# zstream redup DEDUP_STREAM_FILE | zfs receive ...
+.Ed
+.Bl -tag -width "-D"
+.It Fl v
+Verbose.
+Print summary of converted records.
+.Sh SEE ALSO
+.Xr zfs 8 ,
+.Xr zfs-send 8 ,
+.Xr zfs-receive 8