dda5b39711
regents and renumber. This patch skips files in contrib/ and crypto/ Acked by: imp Discussed with: emaste
156 lines
4.6 KiB
Perl
156 lines
4.6 KiB
Perl
.\" Copyright (c) 1986, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)0.t 8.1 (Berkeley) 6/8/93
|
|
.\"
|
|
.EQ
|
|
delim $$
|
|
.EN
|
|
.if n .ND
|
|
.TL
|
|
A Fast File System for UNIX*
|
|
.EH 'SMM:05-%''A Fast File System for \s-2UNIX\s+2'
|
|
.OH 'A Fast File System for \s-2UNIX\s+2''SMM:05-%'
|
|
.AU
|
|
Marshall Kirk McKusick, William N. Joy\(dg,
|
|
Samuel J. Leffler\(dd, Robert S. Fabry
|
|
.AI
|
|
Computer Systems Research Group
|
|
Computer Science Division
|
|
Department of Electrical Engineering and Computer Science
|
|
University of California, Berkeley
|
|
Berkeley, CA 94720
|
|
.AB
|
|
.FS
|
|
* UNIX is a trademark of Bell Laboratories.
|
|
.FE
|
|
.FS
|
|
\(dg William N. Joy is currently employed by:
|
|
Sun Microsystems, Inc, 2550 Garcia Avenue, Mountain View, CA 94043
|
|
.FE
|
|
.FS
|
|
\(dd Samuel J. Leffler is currently employed by:
|
|
Lucasfilm Ltd., PO Box 2009, San Rafael, CA 94912
|
|
.FE
|
|
.FS
|
|
This work was done under grants from
|
|
the National Science Foundation under grant MCS80-05144,
|
|
and the Defense Advance Research Projects Agency (DoD) under
|
|
ARPA Order No. 4031 monitored by Naval Electronic System Command under
|
|
Contract No. N00039-82-C-0235.
|
|
.FE
|
|
A reimplementation of the UNIX file system is described.
|
|
The reimplementation provides substantially higher throughput
|
|
rates by using more flexible allocation policies
|
|
that allow better locality of reference and can
|
|
be adapted to a wide range of peripheral and processor characteristics.
|
|
The new file system clusters data that is sequentially accessed
|
|
and provides two block sizes to allow fast access to large files
|
|
while not wasting large amounts of space for small files.
|
|
File access rates of up to ten times faster than the traditional
|
|
UNIX file system are experienced.
|
|
Long needed enhancements to the programmers'
|
|
interface are discussed.
|
|
These include a mechanism to place advisory locks on files,
|
|
extensions of the name space across file systems,
|
|
the ability to use long file names,
|
|
and provisions for administrative control of resource usage.
|
|
.sp
|
|
.LP
|
|
Revised February 18, 1984
|
|
.AE
|
|
.LP
|
|
.sp 2
|
|
CR Categories and Subject Descriptors:
|
|
D.4.3
|
|
.B "[Operating Systems]":
|
|
File Systems Management \-
|
|
.I "file organization, directory structures, access methods";
|
|
D.4.2
|
|
.B "[Operating Systems]":
|
|
Storage Management \-
|
|
.I "allocation/deallocation strategies, secondary storage devices";
|
|
D.4.8
|
|
.B "[Operating Systems]":
|
|
Performance \-
|
|
.I "measurements, operational analysis";
|
|
H.3.2
|
|
.B "[Information Systems]":
|
|
Information Storage \-
|
|
.I "file organization"
|
|
.sp
|
|
Additional Keywords and Phrases:
|
|
UNIX,
|
|
file system organization,
|
|
file system performance,
|
|
file system design,
|
|
application program interface.
|
|
.sp
|
|
General Terms:
|
|
file system,
|
|
measurement,
|
|
performance.
|
|
.bp
|
|
.ce
|
|
.B "TABLE OF CONTENTS"
|
|
.LP
|
|
.sp 1
|
|
.nf
|
|
.B "1. Introduction"
|
|
.LP
|
|
.sp .5v
|
|
.nf
|
|
.B "2. Old file system
|
|
.LP
|
|
.sp .5v
|
|
.nf
|
|
.B "3. New file system organization
|
|
3.1. Optimizing storage utilization
|
|
3.2. File system parameterization
|
|
3.3. Layout policies
|
|
.LP
|
|
.sp .5v
|
|
.nf
|
|
.B "4. Performance
|
|
.LP
|
|
.sp .5v
|
|
.nf
|
|
.B "5. File system functional enhancements
|
|
5.1. Long file names
|
|
5.2. File locking
|
|
5.3. Symbolic links
|
|
5.4. Rename
|
|
5.5. Quotas
|
|
.LP
|
|
.sp .5v
|
|
.nf
|
|
.B Acknowledgements
|
|
.LP
|
|
.sp .5v
|
|
.nf
|
|
.B References
|