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+.\" SPDX-License-Identifier: CDDL-1.0
+.\"
+.\" 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) 2024, Klara Inc.
+.\"
+.Dd June 17, 2024
+.Dt ZPOOL-DDTPRUNE 8
+.Os
+.
+.Sh NAME
+.Nm zpool-ddtprune
+.Nd Prunes the oldest entries from the single reference dedup table(s)
+.Sh SYNOPSIS
+.Nm zpool
+.Cm ddtprune
+.Fl d Ar days | Fl p Ar percentage
+.Ar pool
+.Sh DESCRIPTION
+This command prunes older unique entries from the dedup table.
+As a complement to the dedup quota feature,
+.Sy ddtprune
+allows removal of older non-duplicate entries to make room for
+newer duplicate entries.
+.Pp
+The amount to prune can be based on a target percentage of the unique entries
+or based on the age (i.e., every unique entry older than N days).
+.
+.Sh SEE ALSO
+.Xr zdb 8 ,
+.Xr zpool-status 8