1.\" $NetBSD: mount_lfs.8,v 1.9 2001/06/05 11:22:48 wiz Exp $ 2.\" 3.\" Copyright (c) 1993, 1994 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)mount_lfs.8 8.5 (Berkeley) 3/30/94 35.\" 36.Dd March 30, 1994 37.Dt MOUNT_LFS 8 38.Os 39.Sh NAME 40.Nm mount_lfs 41.Nd mount a log-structured file system 42.Sh SYNOPSIS 43.Nm "" 44.Op Fl bdns 45.Op Fl N Ar nsegs 46.Op Fl o Ar options 47.Ar special 48.Ar node 49.Sh DESCRIPTION 50The 51.Nm 52command attaches a log-structured file system 53.Ar special 54device on to the file system tree at the point 55.Ar node . 56In addition, the 57.Xr lfs_cleanerd 8 58utility is invoked to clean the file system periodically. 59.Pp 60This command is normally executed by 61.Xr mount 8 62at boot time. 63.Pp 64The options are as follows: 65.Bl -tag -width Ds 66.It Fl b 67Instruct the cleaner to count bytes written, rather than segments read, 68to determine how many segments to clean at once. 69.It Fl d 70Run 71.Xr lfs_cleanerd 8 72in debug mode. 73.It Fl o 74Options are specified with a 75.Fl o 76flag followed by a comma separated string of options. 77See the 78.Xr mount 8 79man page for possible options and their meanings. 80.It Fl N Ar nsegs 81Clean 82.Ar nsegs 83segments (or bytes' worth of segments if 84.Fl b 85is also specified) at a time. 86.It Fl n 87Don't start 88.Xr lfs_cleanerd 8 89on the file system. 90.It Fl s 91Cause 92.Xr lfs_cleanerd 8 93to read data in small chunks when cleaning the file system. 94.El 95.Sh SEE ALSO 96.Xr mount 2 , 97.Xr unmount 2 , 98.Xr fstab 5 , 99.Xr dump_lfs 8 , 100.Xr lfs_cleanerd 8 , 101.Xr mount 8 , 102.Xr newfs_lfs 8 103.sp 104.Rs 105.%A Ousterhout and Douglis 106.%D 1989 107.%T "Beating the I/O Bottleneck: A Case for Log-structured File Systems" 108.%J "Operating Systems Review" 109.%V Vol. 23 110.%N No. 1 111.%P pp. 11-27 112.%O "also available as Technical Report UCB/CSD 88/467" 113.Re 114.Rs 115.%A Rosenblum and Ousterhout 116.%D 1991 117.%T "The Design and Implementation of a Log-Structured File System" 118.%J "ACM SIGOPS Operating Systems Review" 119.%V Vol. 25 120.%N No. 5 121.Re 122.Rs 123.%A Seltzer 124.%D 1992 125.%T "File System Performance and Transaction Support" 126.%B "PhD Thesis, University of California, Berkeley" 127.%O "also available as Technical Report UCB/ERL M92" 128.Re 129.Rs 130.%A Seltzer, Bostic, McKusick and Staelin 131.%D 1993 132.%T "An Implementation of a Log-Structured File System for UNIX" 133.%J "Proc. of the Winter 1993 USENIX Conf." 134.%P pp. 315-331 135.Re 136.Sh HISTORY 137The 138.Nm 139function first appeared in 140.Bx 4.4 . 141