1.\" 2.\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved 3.\" Copyright 2021 Oxide Computer Company 4.\" 5.\" The contents of this file are subject to the terms of the 6.\" Common Development and Distribution License (the "License"). 7.\" You may not use this file except in compliance with the License. 8.\" 9.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10.\" or http://www.opensolaris.org/os/licensing. 11.\" See the License for the specific language governing permissions 12.\" and limitations under the License. 13.\" 14.\" When distributing Covered Code, include this CDDL HEADER in each 15.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16.\" If applicable, add the following below this CDDL HEADER, with the 17.\" fields enclosed by brackets "[]" replaced with your own identifying 18.\" information: Portions Copyright [yyyy] [name of copyright owner] 19.\" 20.Dd November 28, 2007 21.Dt DCFS 4FS 22.Os 23.Sh NAME 24.Nm dcfs 25.Nd Compression file system 26.Sh SYNOPSIS 27.In sys/filio.h 28.In sys/fs/decomp.h 29.Sh DESCRIPTION 30The 31.Nm 32filesystem is a layered filesystem that you use to compress data when writing to 33a file and decompress upon read. 34The primary function of the 35.Nm 36filesystem is to compress individual files when constructing a boot archive and 37when reading or booting from the archive. 38.Sh INTERFACE STABILITY 39.Sy Uncommitted 40.Sh SEE ALSO 41.Xr ufs 4FS , 42.Xr attributes 7 , 43.Xr boot 8 , 44.Xr bootadm 8 , 45.Xr fiocompress 8 46.Sh NOTES 47The 48.Nm 49compression/decompression file system works only with UFS. 50