1.\" $NetBSD: mount_lfs.8,v 1.15 2005/03/31 11:43:14 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. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)mount_lfs.8 8.5 (Berkeley) 3/30/94 31.\" 32.Dd March 31, 2005 33.Dt MOUNT_LFS 8 34.Os 35.Sh NAME 36.Nm mount_lfs 37.Nd mount a log-structured file system 38.Sh SYNOPSIS 39.Nm 40.Op Fl bdins 41.Op Fl N Ar nsegs 42.Op Fl o Ar options 43.Ar special 44.Ar node 45.Sh DESCRIPTION 46The 47.Nm 48command attaches a log-structured file system 49.Ar special 50device on to the file system tree at the point 51.Ar node . 52Both 53.Ar special 54and 55.Ar node 56are converted to absolute paths before use. 57In addition, the 58.Xr lfs_cleanerd 8 59utility is invoked to clean the file system periodically. 60.Pp 61This command is normally executed by 62.Xr mount 8 63at boot time. 64.Pp 65The options are as follows: 66.Bl -tag -width Ds 67.It Fl b 68Instruct the cleaner to count bytes written, rather than segments read, 69to determine how many segments to clean at once. 70.It Fl d 71Run 72.Xr lfs_cleanerd 8 73in debug mode. 74.It Fl i 75Instruct the cleaner to use filesystem idle time as the criterion 76for aggressive cleaning, instead of system load. 77.It Fl o 78Options are specified with a 79.Fl o 80flag followed by a comma separated string of options. 81See the 82.Xr mount 8 83man page for possible options and their meanings. 84.It Fl N Ar nsegs 85Clean 86.Ar nsegs 87segments (or bytes' worth of segments if 88.Fl b 89is also specified) at a time. 90.It Fl n 91Don't start 92.Xr lfs_cleanerd 8 93on the file system. 94.It Fl s 95Cause 96.Xr lfs_cleanerd 8 97to read data in small chunks when cleaning the file system. 98.El 99.Sh SEE ALSO 100.Xr mount 2 , 101.Xr unmount 2 , 102.Xr fstab 5 , 103.Xr dump_lfs 8 , 104.Xr lfs_cleanerd 8 , 105.Xr mount 8 , 106.Xr newfs_lfs 8 107.Rs 108.%A Ousterhout and Douglis 109.%D 1989 110.%T "Beating the I/O Bottleneck: A Case for Log-structured File Systems" 111.%J "Operating Systems Review" 112.%V Vol. 23 113.%N No. 1 114.%P pp. 11-27 115.%O "also available as Technical Report UCB/CSD 88/467" 116.Re 117.Rs 118.%A Rosenblum and Ousterhout 119.%D 1991 120.%T "The Design and Implementation of a Log-Structured File System" 121.%J "ACM SIGOPS Operating Systems Review" 122.%V Vol. 25 123.%N No. 5 124.Re 125.Rs 126.%A Seltzer 127.%D 1992 128.%T "File System Performance and Transaction Support" 129.%B "PhD Thesis, University of California, Berkeley" 130.%O "also available as Technical Report UCB/ERL M92" 131.Re 132.Rs 133.%A Seltzer, Bostic, McKusick and Staelin 134.%D 1993 135.%T "An Implementation of a Log-Structured File System for UNIX" 136.%J "Proc. of the Winter 1993 USENIX Conf." 137.%P pp. 315-331 138.Re 139.Sh HISTORY 140The 141.Nm 142function first appeared in 143.Bx 4.4 . 144