1*bbf21555SRichard Lowe.\" 2*bbf21555SRichard Lowe.\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved 3*bbf21555SRichard Lowe.\" Copyright 2021 Oxide Computer Company 4*bbf21555SRichard Lowe.\" 5*bbf21555SRichard Lowe.\" The contents of this file are subject to the terms of the 6*bbf21555SRichard Lowe.\" Common Development and Distribution License (the "License"). 7*bbf21555SRichard Lowe.\" You may not use this file except in compliance with the License. 8*bbf21555SRichard Lowe.\" 9*bbf21555SRichard Lowe.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*bbf21555SRichard Lowe.\" or http://www.opensolaris.org/os/licensing. 11*bbf21555SRichard Lowe.\" See the License for the specific language governing permissions 12*bbf21555SRichard Lowe.\" and limitations under the License. 13*bbf21555SRichard Lowe.\" 14*bbf21555SRichard Lowe.\" When distributing Covered Code, include this CDDL HEADER in each 15*bbf21555SRichard Lowe.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*bbf21555SRichard Lowe.\" If applicable, add the following below this CDDL HEADER, with the 17*bbf21555SRichard Lowe.\" fields enclosed by brackets "[]" replaced with your own identifying 18*bbf21555SRichard Lowe.\" information: Portions Copyright [yyyy] [name of copyright owner] 19*bbf21555SRichard Lowe.\" 20*bbf21555SRichard Lowe.Dd November 28, 2007 21*bbf21555SRichard Lowe.Dt DCFS 4FS 22*bbf21555SRichard Lowe.Os 23*bbf21555SRichard Lowe.Sh NAME 24*bbf21555SRichard Lowe.Nm dcfs 25*bbf21555SRichard Lowe.Nd Compression file system 26*bbf21555SRichard Lowe.Sh SYNOPSIS 27*bbf21555SRichard Lowe.In sys/filio.h 28*bbf21555SRichard Lowe.In sys/fs/decomp.h 29*bbf21555SRichard Lowe.Sh DESCRIPTION 30*bbf21555SRichard LoweThe 31*bbf21555SRichard Lowe.Nm 32*bbf21555SRichard Lowefilesystem is a layered filesystem that you use to compress data when writing to 33*bbf21555SRichard Lowea file and decompress upon read. 34*bbf21555SRichard LoweThe primary function of the 35*bbf21555SRichard Lowe.Nm 36*bbf21555SRichard Lowefilesystem is to compress individual files when constructing a boot archive and 37*bbf21555SRichard Lowewhen reading or booting from the archive. 38*bbf21555SRichard Lowe.Sh INTERFACE STABILITY 39*bbf21555SRichard Lowe.Sy Uncommitted 40*bbf21555SRichard Lowe.Sh SEE ALSO 41*bbf21555SRichard Lowe.Xr ufs 4FS , 42*bbf21555SRichard Lowe.Xr attributes 7 , 43*bbf21555SRichard Lowe.Xr boot 8 , 44*bbf21555SRichard Lowe.Xr bootadm 8 , 45*bbf21555SRichard Lowe.Xr fiocompress 8 46*bbf21555SRichard Lowe.Sh NOTES 47*bbf21555SRichard LoweThe 48*bbf21555SRichard Lowe.Nm 49*bbf21555SRichard Lowecompression/decompression file system works only with UFS. 50