144 lines
4.0 KiB
Groff
144 lines
4.0 KiB
Groff
.\" $NetBSD: mount_lfs.8,v 1.15 2005/03/31 11:43:14 wiz Exp $
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.\"
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.\" Copyright (c) 1993, 1994
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)mount_lfs.8 8.5 (Berkeley) 3/30/94
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.\"
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.Dd March 31, 2005
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.Dt MOUNT_LFS 8
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.Os
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.Sh NAME
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.Nm mount_lfs
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.Nd mount a log-structured file system
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.Sh SYNOPSIS
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.Nm
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.Op Fl bdins
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.Op Fl N Ar nsegs
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.Op Fl o Ar options
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.Ar special
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.Ar node
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.Sh DESCRIPTION
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The
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.Nm
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command attaches a log-structured file system
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.Ar special
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device on to the file system tree at the point
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.Ar node .
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Both
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.Ar special
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and
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.Ar node
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are converted to absolute paths before use.
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In addition, the
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.Xr lfs_cleanerd 8
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utility is invoked to clean the file system periodically.
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.Pp
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This command is normally executed by
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.Xr mount 8
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at boot time.
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.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl b
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Instruct the cleaner to count bytes written, rather than segments read,
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to determine how many segments to clean at once.
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.It Fl d
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Run
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.Xr lfs_cleanerd 8
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in debug mode.
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.It Fl i
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Instruct the cleaner to use filesystem idle time as the criterion
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for aggressive cleaning, instead of system load.
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.It Fl o
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Options are specified with a
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.Fl o
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flag followed by a comma separated string of options.
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See the
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.Xr mount 8
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man page for possible options and their meanings.
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.It Fl N Ar nsegs
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Clean
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.Ar nsegs
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segments (or bytes' worth of segments if
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.Fl b
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is also specified) at a time.
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.It Fl n
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Don't start
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.Xr lfs_cleanerd 8
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on the file system.
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.It Fl s
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Cause
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.Xr lfs_cleanerd 8
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to read data in small chunks when cleaning the file system.
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.El
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.Sh SEE ALSO
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.Xr mount 2 ,
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.Xr unmount 2 ,
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.Xr fstab 5 ,
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.Xr dump_lfs 8 ,
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.Xr lfs_cleanerd 8 ,
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.Xr mount 8 ,
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.Xr newfs_lfs 8
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.Rs
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.%A Ousterhout and Douglis
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.%D 1989
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.%T "Beating the I/O Bottleneck: A Case for Log-structured File Systems"
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.%J "Operating Systems Review"
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.%V Vol. 23
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.%N No. 1
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.%P pp. 11-27
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.%O "also available as Technical Report UCB/CSD 88/467"
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.Re
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.Rs
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.%A Rosenblum and Ousterhout
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.%D 1991
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.%T "The Design and Implementation of a Log-Structured File System"
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.%J "ACM SIGOPS Operating Systems Review"
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.%V Vol. 25
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.%N No. 5
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.Re
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.Rs
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.%A Seltzer
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.%D 1992
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.%T "File System Performance and Transaction Support"
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.%B "PhD Thesis, University of California, Berkeley"
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.%O "also available as Technical Report UCB/ERL M92"
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.Re
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.Rs
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.%A Seltzer, Bostic, McKusick and Staelin
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.%D 1993
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.%T "An Implementation of a Log-Structured File System for UNIX"
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.%J "Proc. of the Winter 1993 USENIX Conf."
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.%P pp. 315-331
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.Re
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.Sh HISTORY
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The
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.Nm
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function first appeared in
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.Bx 4.4 .
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